Huawei P9 thinks the smart flip case is always on. - Huawei P9 Questions & Answers

Hi not many posts as always been a lurker. I recently changed 2 lcd's on 2 different phones. 1st one went fine, but the second on is just showing as if it has a smart case on it at all times meaning cant access the phones features. Tried a couple of troubleshooting steps but still no avail.
1. Different LCD on phone - still same fault
2. Removed proximity sensor - still same fault
3. tried darkening proximity let through on the glass - still same fault
4. Factory reset and cleared cache - still same fault
The customer did say this was playing up once she had broken the screen but though id tap into you experts knowledge to see if you had come across this before or what could i do to remedies this.
If i posted in wrong area appologies please advise where to post!
Many Thanks
Eddie

As far as I know, it senses magnetic fields in order to determine whether the cover is on or not.
I wouldn't think the magnetic sensor is in the screen, which it also doesn't appear to be.
I would look into troubleshooting there instead. Maybe try "resetting" it by putting a strong magnet to it? At your own risk, of course, though I wouldn't expect much to happen.
Replacing the sensor might be the only way out, and it's probably soldered to the board.

Foscot thanks for your reply, will look into this and see if i can get some results. Will post to confirm.

Foscot said:
As far as I know, it senses magnetic fields in order to determine whether the cover is on or not.
I wouldn't think the magnetic sensor is in the screen, which it also doesn't appear to be.
I would look into troubleshooting there instead. Maybe try "resetting" it by putting a strong magnet to it? At your own risk, of course, though I wouldn't expect much to happen.
Replacing the sensor might be the only way out, and it's probably soldered to the board.
Click to expand...
Click to collapse
Hi Foscot, a few updates, i noticed the liquid indicator is red so it seems that some damaged must of been caused there, mostly at the bottom of the handset. I cleaned with alcohol and the handset come to light and was working with full screen but then went back to its flip case state. i am thinking maybe changing the sub pba (if i can find one)
Thanks for your help
Will post updates.

lyncomm said:
Hi Foscot, a few updates, i noticed the liquid indicator is red so it seems that some damaged must of been caused there, mostly at the bottom of the handset. I cleaned with alcohol and the handset come to light and was working with full screen but then went back to its flip case state. i am thinking maybe changing the sub pba (if i can find one)
Thanks for your help
Will post updates.
Click to expand...
Click to collapse
Makes a lot of sense. Water shorted out the magnetic field sensor, which has caused it to always sense the flip case. New PBA is likely the only fix.
Make sure to keep me updated, it's quite interesting

Foscot said:
Makes a lot of sense. Water shorted out the magnetic field sensor, which has caused it to always sense the flip case. New PBA is likely the only fix.
Make sure to keep me updated, it's quite interesting
Click to expand...
Click to collapse
All good it seems, i doused in alcohol and gave it a good clean and charged over night now 100% battery with no flip case problem! sensor must be sorted ! going to give back to customer and hopefully all stays well. Many thanks for your help!

Hi. Interesting post. Can you tell me which part of the phone you cleaned with alcohol? Have the same problem with my p9 plus which thinks the flip case is on. Disassembled much of the phone and tried to clean it with paper and alcohohol but with no result. Also tried putting a magnet near the phone.

Update. Disassembled the phone and cleaned all the parts on the lower side of the phone including the board and now it works again.

Related

[Q] the wifi HARDWARE problem fix?

Hi
I have the c5502 with the bluetooth/wifi problem , the repair service told me they can fix it with bridges or smth and the problem will appear again,
First i dont believe them that much i just feel that they wanted me to pay for a new PCB
Question: Is this problem really fixable or should i buy a new one
Someone told me he will reweld the wifi and it is fixed
Note: The problem was temporarly fixed when i press hard on the back next to mic 2, but no longer works
Judging by your description, it might be that the WiFi/BT chip isn't attached well - some of the balls in the BGA (Ball Grid Array, look it up) have cracks that prevent proper contact.
If this is indeed the case, it can be fixed by reflowing or just directed heating of the chip area to the melting temperature of the soldering alloy.
However, this might not be the problem - and if it isn't, there might be a host of reasons for it.
You need to correlate the location of the WiFi/BT chip and the pressure you're applying.
Jack_R1 said:
Judging by your description, it might be that the WiFi/BT chip isn't attached well - some of the balls in the BGA (Ball Grid Array, look it up) have cracks that prevent proper contact.
If this is indeed the case, it can be fixed by reflowing or just directed heating of the chip area to the melting temperature of the soldering alloy.
However, this might not be the problem - and if it isn't, there might be a host of reasons for it.
You need to correlate the location of the WiFi/BT chip and the pressure you're applying.
Click to expand...
Click to collapse
wow thank you, i looke it up it should be simple
could you tell me what is the bridging he talked about ?
He might be suspecting something else.
synos_x said:
Hi
I have the c5502 with the bluetooth/wifi problem , the repair service told me they can fix it with bridges or smth and the problem will appear again,
First i dont believe them that much i just feel that they wanted me to pay for a new PCB
Question: Is this problem really fixable or should i buy a new one
Someone told me he will reweld the wifi and it is fixed
Note: The problem was temporarly fixed when i press hard on the back next to mic 2, but no longer works
Click to expand...
Click to collapse
I have fixed my WiFi but bluetooth is still dead.
The WiFi problem is actually a poor connection between two boards inside the phone. There's two boards that need to make contact but because they aren't hard-wired together they rely on a touch contact. There's a shiny foil square on top board (main pcb) that has to contact conductive square on lower board. The shiny foil square looks like it gets compressed over time which is why the wifi only fails on some phones after a while. Some phones will be fine but I think it's just poor engineering to rely on a soft touch contact!!
When you push in the back against the mic you are pushing the boards together to make contact.
I fixed by placing some of the screen adhesive (which I had plenty of after removing screen) underneath the spacer pad that is under the bottom board. This forces the boards together and keeps the WiFi going.
However, I thought this would fix bluetooth but no such luck. Perhaps there's another connection that's not right somewhere?
so i sent it to a repair center sony told me the board is fried, i dont know what this means , everything works except for wifi bluetooth, they are both working until now, i think they heated the wifi part on the board
Silverdace said:
I have fixed my WiFi but bluetooth is still dead.
The WiFi problem is actually a poor connection between two boards inside the phone. There's two boards that need to make contact but because they aren't hard-wired together they rely on a touch contact. There's a shiny foil square on top board (main pcb) that has to contact conductive square on lower board. The shiny foil square looks like it gets compressed over time which is why the wifi only fails on some phones after a while. Some phones will be fine but I think it's just poor engineering to rely on a soft touch contact!!
When you push in the back against the mic you are pushing the boards together to make contact.
I fixed by placing some of the screen adhesive (which I had plenty of after removing screen) underneath the spacer pad that is under the bottom board. This forces the boards together and keeps the WiFi going.
However, I thought this would fix bluetooth but no such luck. Perhaps there's another connection that's not right somewhere?
Click to expand...
Click to collapse
Hi,
Can you please let me know that how did you open that phone? did you opened it by your self?
Is it possible to open from back side only?
Do you have pictures for wifi solution which you described above?
nikunjnandaniya said:
Hi,
Can you please let me know that how did you open that phone? did you opened it by your self?
Is it possible to open from back side only?
Do you have pictures for wifi solution which you described above?
Click to expand...
Click to collapse
Hi sorry but don't have phone any more. Don't think I have pictures any more either.
You cannot open from back side only. You have to take off screen. Look on youtube to see how it's done.
Silverdace said:
Hi sorry but don't have phone any more. Don't think I have pictures any more either.
You cannot open from back side only. You have to take off screen. Look on youtube to see how it's done.
Click to expand...
Click to collapse
Hi,
Thanks for your reply. Currently i had press with pressure back side and it's working for me.
But let say if i open phone as shown in youtube then do i need anything extra to assemble my phone again?
Thanks that you have write your wifi issue here and it will help others.
nikunjnandaniya said:
Hi,
Thanks for your reply. Currently i had press with pressure back side and it's working for me.
But let say if i open phone as shown in youtube then do i need anything extra to assemble my phone again?
Thanks that you have write your wifi issue here and it will help others.
Click to expand...
Click to collapse
Yes, you'll need the screen adhesive stuff. Can find on eBay or Aliexpress or Witrigs etc.
synos_x said:
Hi
I have the c5502 with the bluetooth/wifi problem , the repair service told me they can fix it with bridges or smth and the problem will appear again,
First i dont believe them that much i just feel that they wanted me to pay for a new PCB
Question: Is this problem really fixable or should i buy a new one
Someone told me he will reweld the wifi and it is fixed
Note: The problem was temporarly fixed when i press hard on the back next to mic 2, but no longer works
Click to expand...
Click to collapse
old thread but just in case some zr user are still searching for an answer
there is a chip on main pcb which controls wifi and bluetooth, but sony didn't soldered it correctly and thus it needs pressure to make connections with pcb.
Only permanent solution is to apply heat on that chip ( after disassembling pcb from phone ) and then it will work for forever.
My phone's ( zr ) wifi bluetooth and nfc wasn't working, so i dissembled it and took the pcb to a laptop repair shop and told them to apply heat on that chip to solder it correctly ( as i don't have that instrument which is used to apply heat on small point ), and after that it is working without any issue. :highfive:
Note:- be carefull while removing screen as it is very fragile and will brake easily if not handled correctly ( yes i broke my screen and using an after market now which costed me Rs1800 ( for full folder ), i was lucky to still find its screen .
Saw Sooper diff DDI dijauhkan I'd do so

Proximity Sensor issue after screen change

So after 1 month I cracked the screen on the G4.
I replaced the screen which was super easy luckily. Now having an issue with the screen re-locking when in low light. Also double tap to wake doesn't work however, double tap to sleep works.
Also, when you hit dial on a call or answer a call the screen automatically goes black and you cannot wake until someone hangs up.
Ive searched and seen the issue some people have tried apps to fix this but ive tried everything without success. What gives? When running a phone sensor app, the proximity always reads "Near."
Any Ideas???!!!
gs00000 said:
So after 1 month I cracked the screen on the G4.
I replaced the screen which was super easy luckily. Now having an issue with the screen re-locking when in low light. Also double tap to wake doesn't work however, double tap to sleep works.
Also, when you hit dial on a call or answer a call the screen automatically goes black and you cannot wake until someone hangs up.
Ive searched and seen the issue some people have tried apps to fix this but ive tried everything without success. What gives? When running a phone sensor app, the proximity always reads "Near."
Any Ideas???!!!
Click to expand...
Click to collapse
I put a glass screen protector on which covered the proximity sensor and I got the same issues. I'm just waiting for something to get rid of the proximity sensor altogether.
hphan said:
I put a glass screen protector on which covered the proximity sensor and I got the same issues. I'm just waiting for something to get rid of the proximity sensor altogether.
Click to expand...
Click to collapse
I just received my yootech screen protector and that solved all my issues. The sensor on these things are really sensitive.
Sent from my LG-H811 using XDA Free mobile app
I may have the answer for you hopefully you didn't trash the original screen.
I was having the same issue as you so I went back and throughly examined the original front assembly and found that there is a rubber spacer with two small holes in it that sits down in the hole where the proximity sensor goes. This rubber piece was not on the OEM replacement screen assembly that I had purchased. After pulling this piece out of the original screen and putting it in my new replacement screen the problem stopped. Phone now works like new again!!! Hopefully this solves your problem also.
Thanks a ton!!!!!
mhozlock said:
I may have the answer for you hopefully you didn't trash the original screen.
I was having the same issue as you so I went back and throughly examined the original front assembly and found that there is a rubber spacer with two small holes in it that sits down in the hole where the proximity sensor goes. This rubber piece was not on the OEM replacement screen assembly that I had purchased. After pulling this piece out of the original screen and putting it in my new replacement screen the problem stopped. Phone now works like new again!!! Hopefully this solves your problem also.
Click to expand...
Click to collapse
:good:
It worked. This little sucker made the prox sensor to be as 'near' all the time. so calls or knock code were not working.
Rechecked the original frame and removed the prox assembly you mentioned, two other rubber fillers and the ear piece grill.
Worked like a charm.
Thanks a ton. Have attached a pic for users still looking for a solution.
Sud
Dude you are the man! I also replaced my own screen (was almost too easy) but missed this little rubber piece. I scoured the internet and tried everything else, but this ACTUALLY fixed it. Thanks a million!!!
To everyone else still having screen issues: it is a known problem and apparently there are several solutions out there. Most likely you need to do one or more of the following: get your finger off the sensor, re-calibrate it (type 277634#*# in phone dialer. Note: I actually did not have this specific calibration setting on my g4, but others do), software update (probably not), hard reset your phone, or replace your proximity sensor (download one of the apps out there first and run a test).
If non of that works you probably need a new phone XD
Update: You will need the 2 other rubber pieces (mentioned above) for your microphones, otherwise everyone will complain about how you sound on the other end.
You sir are a legend !
This work perfect for me. This should be made a top post as it has just saved me countless time and money.
Hope you have a merry Xmas
Thank you thank you thank you!!!
So tired of trying to figure out 'how to ask' the right question for this issue! Came across this thread and fortunately DID NOT throw out the old screen/digitizer after I replaced with OEM new unit but there were NO instructions regarding this little rubber piece! Couldn't upload the picture but it's EXACTLY like your pic! Thanks again for sharing! I'm fixed!!!
geekMeOutPlease said:
Dude you are the man! I also replaced my own screen (was almost too easy) but missed this little rubber piece. I scoured the internet and tried everything else, but this ACTUALLY fixed it. Thanks a million!!!
To everyone else still having screen issues: it is a known problem and apparently there are several solutions out there. Most likely you need to do one or more of the following: get your finger off the sensor, re-calibrate it (type 277634#*# in phone dialer. Note: I actually did not have this specific calibration setting on my g4, but others do), software update (probably not), hard reset your phone, or replace your proximity sensor (download one of the apps out there first and run a test).
If non of that works you probably need a new phone XD
Update: You will need the 2 other rubber pieces (mentioned above) for your microphones, otherwise everyone will complain about how you sound on the other end.
Click to expand...
Click to collapse
Just finished an LG G4 replacement. Had the same issue and the same fix listed above. Pop the little rubber seating out and into the new screen, works like a charm.
Just cracked my screen..
Where can I find the OEM replacement screen from reliable sources?
blakechan said:
Just cracked my screen..
Where can I find the OEM replacement screen from reliable sources?
Click to expand...
Click to collapse
Try Etradesupply, I bought from them before, part came in good quality though it cost higher than ebay and Amazon, no complaints. http://www.etradesupply.com/lg-g4-vs986-lcd-assembly-with-frame-no-small-parts-black.html
Thank you resolved my issue
---------- Post added at 11:57 PM ---------- Previous post was at 11:49 PM ----------
blakechan said:
Just cracked my screen..
Where can I find the OEM replacement screen from reliable sources?
Click to expand...
Click to collapse
I just replacement my screen from fixez.com,
very important make sure you save the rubber from the proximity sensor and install it on the new display
I kinda threw my old screen away... Anyone knows if I can find a new little rubber piece (whatever it is) and if so, where? Thanks a lot!
sud_ran said:
:good:
It worked. This little sucker made the prox sensor to be as 'near' all the time. so calls or knock code were not working.
Rechecked the original frame and removed the prox assembly you mentioned, two other rubber fillers and the ear piece grill.
Worked like a charm.
Thanks a ton. Have attached a pic for users still looking for a solution.
Sud
Click to expand...
Click to collapse
Thanks your for your post - Saved my G4 after replacing my cracked LCD at repair shop that failed to transfer that little rubber piece.
I went back the shop and asked for the my old cracked screen, opened up my phone and put the little piece and phone works like a charm!
Thanks a million for the post and photo!!!!!!!!!!!!!!!:good::good:
For those who lost the rubber
hello guys. I have the H818P LG G4 model and when buying the screen I thought I must buy a dual-sim compatible frame (but now I think that even other screen models work. I didn't notice any difference when I disassembled the phone - but never tried). long story short, I had to send my phone to Iraq to find a compatible screen replacement and I received it back without the little rubber, with all the problems above. I had to improvise until I get my old frame back.
I tried all the apps but none of them worked. Your phone needs to be rooted to disable the proximity sensor, which is extremely risky on LG G4 (and especially on my model) as they don't get proper focus. you also need to downgrade to lollipop if you upgraded your android version to marshmallow. it is quiet complicated.
I read a solution suggesting to put a little piece of foil paper in front of the sensor to reflect the light back to it. It's easier and surprisingly less risky than messing with the software. I'm going to disassemble my phone and try it now.
update: the role of the aluminium foil is not to reflect light, but to obstruct it. the sensor is composed of two compounds: infrared emitter and light detector. the infrared shouldn't reach the light detector if you want the proximity sensor to remain off. After a couple of tries, I used a small piece of duct tape to cover them both. Works fine. side effect: automatic luminosity thinks it's always dark. I didn't bother dissembling my phone again to uncover the light sensor as I don't use automatic luminosity that much and that I'm going to get the rubber within two weeks.
This works. Perfect solution. Had the same problem after a screen replacement
Awesome!
[email protected] said:
Thanks your for your post - Saved my G4 after replacing my cracked LCD at repair shop that failed to transfer that little rubber piece.
I went back the shop and asked for the my old cracked screen, opened up my phone and put the little piece and phone works like a charm!
Thanks a million for the post and photo!!!!!!!!!!!!!!!:good::good:
Click to expand...
Click to collapse
Glad it helped. Enjoy.
I got rid of my G4 after that bootloop auto shut off issue and bought a N6P.
Just restored G4 yesterday with the new method turning off the big cores. Its one of the best phones i had, wish i could get the motherboard fixed under warranty..
Unfortunately i moved out of USA so can't do that anymore.
Thanks a Million!!!! Mhozlock's fix and sud_ran's pictures saved my day! Thought I had somehow ****ed up my girl's phone's proximity sensor when I replaced the screen! Thanks!
mhozlock said:
I may have the answer for you hopefully you didn't trash the original screen.
I was having the same issue as you so I went back and throughly examined the original front assembly and found that there is a rubber spacer with two small holes in it that sits down in the hole where the proximity sensor goes. This rubber piece was not on the OEM replacement screen assembly that I had purchased. After pulling this piece out of the original screen and putting it in my new replacement screen the problem stopped. Phone now works like new again!!! Hopefully this solves your problem also.
Click to expand...
Click to collapse
You just saved my life
Thank you for the tipp. Now the proximity sensor is working again!
mhozlock said:
I may have the answer for you hopefully you didn't trash the original screen.
I was having the same issue as you so I went back and throughly examined the original front assembly and found that there is a rubber spacer with two small holes in it that sits down in the hole where the proximity sensor goes. This rubber piece was not on the OEM replacement screen assembly that I had purchased. After pulling this piece out of the original screen and putting it in my new replacement screen the problem stopped. Phone now works like new again!!! Hopefully this solves your problem also.
Click to expand...
Click to collapse
sud_ran said:
:good:
It worked. This little sucker made the prox sensor to be as 'near' all the time. so calls or knock code were not working.
Rechecked the original frame and removed the prox assembly you mentioned, two other rubber fillers and the ear piece grill.
Worked like a charm.
Thanks a ton. Have attached a pic for users still looking for a solution.
Sud
Click to expand...
Click to collapse
Thank you! This must be the problem. I'm guessing that's why the phone speaker has gone super quiet too – I must have lost the gasket for that as well. Wish these gaskets were mentioned in the tear down video I followed (https://www.youtube.com/watch?v=iS02J12I1MU), or that I'd been careful enough to notice the damn things. Unfortunately, I chucked the old frame last week so I can't cannibalize it now
If you end up in my situation there seems to be three options:
1) Buy a broken spares-or-repairs G4 on Ebay and cannibalize it. There are a few out there but they tend to be kinda pricey (£40+) for a broken phone
2) Buy a spare part. The G4 prox sensor gasket number is MBL66397801. Some parts retailers list it but none have it in stock currently (Sep 2016)
3) Try making your own by poking holes in a bit of tape: https://www.youtube.com/watch?v=ZzbznNb-aXM I'm gonna give this a go tonight... wish me luck!

(Q) Camera pictures are blurry on the left edge

I bought this phone last year to test AT&T's coverage, but am considering promoting it to a more permanent position, so I am finally looking into some of its problems. This phone's camera takes pictures that are clear in the center, but blurry on the left (or top, when shooting in portrait) 20-35%, no matter what. There is a noteworthy dent on the back cover, so the question is if it is more likely that the problem is caused by the bent cover or by damage to the camera module itself. Any ideas?
Either way, you'll have to remove cover, so when you do, take a picture without it. If the problem goes away, it's the back case, replace it.
If not, it might be the camera module, replace it. Either is pretty cheap on Ali, but if you remove the back cover, order a new one. It's almost impossible to remove it without damaging it.
Good idea; will try!
daedric said:
Either way, you'll have to remove cover, so when you do, take a picture without it. If the problem goes away, it's the back case, replace it.
If not, it might be the camera module, replace it. Either is pretty cheap on Ali, but if you remove the back cover, order a new one. It's almost impossible to remove it without damaging it.
Click to expand...
Click to collapse
That's pretty much what I was planning after researching things a bit. I'll order just a screen first, then dismantle the device and replace the screen, but hold off on putting the back cover on until test pictures have been taken. I'm excited to get this phone back into working shape!
There's A LOT of stuff you must remove from the screen, speakers, battery etc etc. It can be done, but pay attention.
Report back latter will you ?
Also, when you're putting the (new) back case on it, the top of the device goes first, not the bottom. Don't worry with the USB plug, worry with the power button/IR blaster and the top mic.
Not looking forward to it, but it should be an interesting experience
daedric said:
There's A LOT of stuff you must remove from the screen, speakers, battery etc etc. It can be done, but pay attention.
Report back later will you ?
Also, when you're putting the (new) back case on it, the top of the device goes first, not the bottom. Don't worry with the USB plug, worry with the power button/IR blaster and the top mic.
Click to expand...
Click to collapse
I'll report back with the results either way. I have seen the videos showing how involved the process is and am not looking forward to it. This should prove to be an educational experience in surgical precision, keeping track of parts, not losing screws, and remembering what order things get installed.
1 down, 2 to go
Screen replacement was a success! :laugh: But wow, that was a lot of work. This has to be one of the most time-consuming screen replacements in the entire industry. As for the camera problem, the issue does persist with the back cover off, so it looks like I'll have to source a new camera module as well as a new back cover (which got slightly damaged in the process).
I'll upload some photos as the project progresses.
Fixed!... but with strings attached
Just to provide some closure for this fiasco, I did finally get the HTC One fixed and reassembled properly. Here's a quick recap:
Following the initial successful screen replacement, I bought a replacement camera module and back cover for the phone (because the problem persisted with the back cover off and because I had ruined the original back cover during the original disassembly). Upon installing both, I promptly reassembled the phone and discovered that the SIM card slot was no good on the replacement screen assembly. Talk about a major bummer!
From here, I was actually able to carefully remove the (shiny new!) back panel without causing any damage and requested a replacement screen assembly. Replacement was the wrong color. Two weeks later, the correct one finally came in, and I went through the (rather convoluted) procedure of painstakingly taking everything off of the screen assembly and placing it onto the replacement... again.
This time, everything worked, (including the SIM slot) so I slapped the back cover on, but was disappointed to find that the volume-down key had come out of alignment during the second back cover install. Also, the vibration motor had worked its way out of place and was rather noisy. For a third time, I ventured back in and managed to get the back cover off without causing much additional damage (there are some small marks on it now, but it still looks a heck of a lot better than it did before) and stuck some adhesive to the side of the motor in order to hold it into the slot better. I also performed the final snapping on of the back cover more carefully.
Finally, the phone is reassembled and fully functional. Camera photos no longer have a blurry edge, but are occasionally blurry either all over or in certain places. It is capable of taking completely clear shots though, which is interesting. Regardless, I've pretty much given up on getting this thing to perfection, and because of the fact that it isn't my daily driver, the camera not working right is not a dealbreaker. At any rate, it seems like finding a properly functioning camera module for this model is nearly impossible. Also, the right (bottom) speaker's volume is now sometimes a little quieter than the left (top) one, depending on the volume. As before, the MicroUSB connection still doesn't allow the cable to plug in all the way, which makes it really easy to accidentally disconnect, but it does still work fine.
With all that said, I've attached a picture of the repaired phone along with a new old-stock Incipio Feather grip casing that I found locally. The Incipio fits pretty nicely and I really like the feel of it, but debris sticks to it amazingly well. Even something as simple as wiping it with a cloth will leave behind a whole covfefe of specs. Liquid baptism and air drying is the only way to fully clean it.
TL;DR? Don't break your HTC One in a way that requires disassembly or repair. Ever. Even if the camera sucks, be thankful that it is fully functional (if it is). If you do attempt a repair operation of any kind, test the SIM card slot and camera (and speakers) fully before putting the thing back together and mind the volume keys as you put the back cover on.

Phone burst into flames during repair, need advice with new parts.

So, the screen on my Note 4X broke, and I wanted to replace it. Long story short, the battery is glued down hard as **** and I managed to damage it, and it burst into flames. I'm fine, I was prepared, nothing but the phone suffered any damage.
But now I'm sitting here, with a phone that's basically still fine minus the frame and the battery, and I still want to repair it.
I'm faced with two questions, first of all, I managed to find (I think) every part I need, but one eludes me. I don't even know what it's for. You can see it here (minute 9:11-9:27):
https://youtu.be/MQazwoEssN0?t=556
It says "C6_LEDFPC_V1.0" on mine. Google tells me nothing about that, and it's not a part I have seen on the repair shop sites. It doesn't even seem to be present on complete frame+display assemblies like this one:
https://www.aliexpress.com/item/LCD...edmi-Note-4X-hongmi-Red-Rise/32810566637.html
And apart from that, I wonder if I missed any part.
I still have:
A new display+digitizer, the back cover, the mainboard with the SoC and the two cameras, the PCB with the charging board, the battery cable, the sim tray, the fingerprint reader, the loudspeaker.
I need:
A new frame, an earpiece, the mainboard flex cable, the side key flex cable, a battery, and the one mysterious piece.
Is that everything? Does everyone has a basic list of all the parts?
anon768 said:
So, the screen on my Note 4X broke, and I wanted to replace it. Long story short, the battery is glued down hard as **** and I managed to damage it, and it burst into flames. I'm fine, I was prepared, nothing but the phone suffered any damage.
But now I'm sitting here, with a phone that's basically still fine minus the frame and the battery, and I still want to repair it.
I'm faced with two questions, first of all, I managed to find (I think) every part I need, but one eludes me. I don't even know what it's for. You can see it here (minute 9:11-9:27):
https://youtu.be/MQazwoEssN0?t=556
It says "C6_LEDFPC_V1.0" on mine. Google tells me nothing about that, and it's not a part I have seen on the repair shop sites. It doesn't even seem to be present on complete frame+display assemblies like this one:
https://www.aliexpress.com/item/LCD...edmi-Note-4X-hongmi-Red-Rise/32810566637.html
And apart from that, I wonder if I missed any part.
I still have:
A new display+digitizer, the back cover, the mainboard with the SoC and the two cameras, the PCB with the charging board, the battery cable, the sim tray, the fingerprint reader, the loudspeaker.
I need:
A new frame, an earpiece, the mainboard flex cable, the side key flex cable, a battery, and the one mysterious piece.
Is that everything? Does everyone has a basic list of all the parts?
Click to expand...
Click to collapse
I've been thinking that in the video, the guy switched on the phone without that part. so that part shouldn't be a very major component. In my opinion, it can be some sort of sensor. I personally feel its a magnet screen sensor for covers with smart wake up function.
The reason I say this is because when i touch a small magnet on the entire front panel, It gets stuck on that same point.
However I am not very sure as the smart wake is not triggered. Maybe it is because I am on LineageOS.
Hope It turns out helpful.
You will probably need the vibrator motor too, its quite small and easy to lose as I've found.
one like this:
link
That part is the LED for the capacitive buttons. Not important at all if you cant find it

Screen Flickering

Hey guys
I have a very strange problem with my Huawei P10
About 2 weeks ago, I noticed that two purple horizontal stripes are appearing in a 3-4sec sequence
Normally, I would immediately ask for a repair, but there's a thing which persecutes me: it only happens when I don't touch the screen for longer than 3-4sec
When there's a continuous contact with the screen (e.g when writing a message) nothing happens, everything is fine and dandy, but whenever I leave the screen for itself for 3 or more seconds (e.g when watching a movie), the stripes start to appear every few seconds, and continue until the screen goes dark or until I touch it again, but after touching it it still takes only a few seconds for the stripes to sequentially flicker again
Here's what I've tried so far (no result):
- safe mode
- factory reset
- cache partition wiping
- cord input deep clean
What may be the reason?
Hey.
It's 100% a board or Display issue. send it for repairs. but i believe maybe you've dropped ur phone. Anyways Huawei knows better.
Erfan_rv said:
Hey.
It's 100% a board or Display issue. send it for repairs. but i believe maybe you've dropped ur phone. Anyways Huawei knows better.
Click to expand...
Click to collapse
It's quite complicated
I once dropped it, but even after that, the previous LCD worked fine, there were no errors other than broken glass, so I guess we could exclude a board issue and lean toward your second option, as now that the LCD has been replaced, the fault occurs
What's more, I noticed that if I press the Home Key, and then put my finger in the bottom right corner and hold it, I can still use the whole LCD space without the flickering (I need to press the Home Key first so that it works after I hold my finger in the corner)
It's like the LCD needs to be in contact with your finger all the time to avoid that, which has led me to an idea: would a tempered glass solve that maybe?
fengels said:
It's quite complicated
I once dropped it, but even after that, the previous LCD worked fine, there were no errors other than broken glass, so I guess we could exclude a board issue and lean toward your second option, as now that the LCD has been replaced, the fault occurs
What's more, I noticed that if I press the Home Key, and then put my finger in the bottom right corner and hold it, I can still use the whole LCD space without the flickering (I need to press the Home Key first so that it works after I hold my finger in the corner)
It's like the LCD needs to be in contact with your finger all the time to avoid that, which has led me to an idea: would a tempered glass solve that maybe?
Click to expand...
Click to collapse
I can't really answer for sure but i believe if there's a Huawei service center in your city and you try to fix ur broken huawei, your wasting your time. Whatever solution u apply on ur phone its just gonna be temporary since u hide your problem and not solved it.
Erfan_rv said:
I can't really answer for sure but i believe if there's a Huawei service center in your city and you try to fix ur broken huawei, your wasting your time. Whatever solution u apply on ur phone its just gonna be temporary since u hide your problem and not solved it.
Click to expand...
Click to collapse
I still think (or should I say believe ) that there's a solution which doesn't involve another screen replacement
As for your "temporary solution" mention, I guess if I found one, it wouldn't be temporary, since the fault doesn't progress, it's been the same for a month or so when it first occured, which gives me another reason not to replace the screen and keep looking for other possibilities
I don't need a Huawei service center, I can replace the LCD myself (didn't do that the first time though), but it still involves spending money, whereas I've been looking for unpaid solutions the whole time; getting a new LCD is an extremity
fengels said:
I still think (or should I say believe ) that there's a solution which doesn't involve another screen replacement
As for your "temporary solution" mention, I guess if I found one, it wouldn't be temporary, since the fault doesn't progress, it's been the same for a month or so when it first occured, which gives me another reason not to replace the screen and keep looking for other possibilities
I don't need a Huawei service center, I can replace the LCD myself (didn't do that the first time though), but it still involves spending money, whereas I've been looking for unpaid solutions the whole time; getting a new LCD is an extremity
Click to expand...
Click to collapse
You can ask them to diagnose it and tell you about problem noone makes you pay for a lcd. And after reading your message over and over (And since i repair TVs and everything with electronics inside) i think it also can be your touch or display controller ic. Mostly it could be from touch ic since screen works fine while its in touch with something. But someone has to try your lcd or mb on a healthy one to make sure. which you can't do nothing like that. or do you?
@fengels did You bought original lcd, where can I buy it in good price?
I know this problem from older galaxy series like s5. The fix for this most of the time was disable auto brightness or higher the brightness on auto brightness. Don't know if this is the same problem, but it could be a try. Also don't know which cause this strange problem. Hope it can help you
Syco2oo5 said:
I know this problem from older galaxy series like s5. The fix for this most of the time was disable auto brightness or higher the brightness on auto brightness. Don't know if this is the same problem, but it could be a try. Also don't know which cause this strange problem. Hope it can help you
Click to expand...
Click to collapse
No, it's a different problem, in the galaxy series the whole screen would flicker, whereas in my P10 it's only 2 horizontal stripes appearing in a 4-5 sec sequence whenever I leave the screen untouched for longer than 5sec
Playing around with the brightness doesn't solve that unfortunately, actually no in-device settings do, as I've tried almost every single option which is screen-related, like switching the eye comfort mode on, but still no result
The main reason why I'm still looking for an unpaid solution is that apart from this one error, the phone is like brand new, everything works fine
ok, so if I understad the problem shows up after you replaced the LCD display? So do you really think is more software related than hardware? I personally would send it to diagnose and repair.
DallasCZ said:
ok, so if I understad the problem shows up after you replaced the LCD display? So do you really think is more software related than hardware? I personally would send it to diagnose and repair.
Click to expand...
Click to collapse
The thing is it didn't show up immediately, I had used the phone for some time with no errors before it first occured
Also, since the new LCD was set, I haven't done any physical damage to it, I've never dropped or sunk the phone
Since you guys mostly advise me to send it, I guess that's what I will have to do
fengels said:
The thing is it didn't show up immediately, I had used the phone for some time with no errors before it first occured
Also, since the new LCD was set, I haven't done any physical damage to it, I've never dropped or sunk the phone
Since you guys mostly advise me to send it, I guess that's what I will have to do
Click to expand...
Click to collapse
While you were replacing screen, did you turn your device off and disconnect the battery? and i think cleaning all cables coming from LCD and related sockets on motherboard can help. Use thinner or alcohol and if you wanna use thinner be careful so it wouldn't touch anything except golden contacts. Thinner is dangerous and affects ur phone color and plastic parts.
Erfan_rv said:
While you were replacing screen, did you turn your device off and disconnect the battery? and i think cleaning all cables coming from LCD and related sockets on motherboard can help. Use thinner or alcohol and if you wanna use thinner be careful so it wouldn't touch anything except golden contacts. Thinner is dangerous and affects ur phone color and plastic parts.
Click to expand...
Click to collapse
I did turn the device off, but I didn't take the battery off, since it's strongly glued to the phone's body, and I didn't want to damage it
Anyway, could not taking the battery off really be the reason?
As for cleaning, I did it by simply blowing out all the potential dirt, I'm inexperienced in thinner and alcohol cleaning
fengels said:
I did turn the device off, but I didn't take the battery off, since it's strongly glued to the phone's body, and I didn't want to damage it
Anyway, could not taking the battery off really be the reason?
As for cleaning, I did it by simply blowing out all the potential dirt, I'm inexperienced in thinner and alcohol cleaning
Click to expand...
Click to collapse
I am not sure butbon some phones it damages screen. I've seen this on laptops. But anyways its done. Open ur phone and use alcohol. put 2 drops of alcohol on each socket and flat cable connectors and brush it with a soft brush. u don't want to bent any golden contact. It's last thing u can do to fix it without paying for hardware related stuff.
Erfan_rv said:
I am not sure butbon some phones it damages screen. I've seen this on laptops. But anyways its done. Open ur phone and use alcohol. put 2 drops of alcohol on each socket and flat cable connectors and brush it with a soft brush. u don't want to bent any golden contact. It's last thing u can do to fix it without paying for hardware related stuff.
Click to expand...
Click to collapse
Well, will definitely try it then, but what alcohol? Does it need to be something specific?
fengels said:
Well, will definitely try it then, but what alcohol? Does it need to be something specific?
Click to expand...
Click to collapse
Just regular alcohol that drug stores sell. for using on injection. sorry my English is awful.

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