Database Develop

[Q] Slideout Keyboard Problem - HTC LIBRA (SMT5800)

Hi, i have an issue with my phone... I was texting then suddely the slideout keyboard started malfuctioning
The space, function, ****/caps and the period wont work. Also the two softkeys wont work... All the other keys work fine, and the weird thing is, when I press shift+backspace and function+enter it types "mx"
I hope its a software problem cuz right now I dont have money to get it checked out and its an old phone so theres no warranty to use
Thanks!

Update:
I tried with a Hard Reset and It didnt fix anything... I guess its a hardware problem

romsfan said:
Update:
I tried with a Hard Reset and It didnt fix anything... I guess its a hardware problem
Click to expand...
Click to collapse
try with this to get it done

Hakim Rahman said:
try with this to get it done
Click to expand...
Click to collapse
This did not work AT ALL. In fact, it apparently disabled ALL of the keys from both keyboards and I had to do ANOTHER hard reset. I couldn't even turn the phone off, had to remove the bat to do it...

I opened the back of the phone and removed the case... I removed the circuit board and I looked around... Everything seemed fine but my slideout keyboard still doesnt work
Do you think it could be a problem with the keyboard or maybe something got disconnected or something?
Please help, i dont have any money to get it fixed

Hi ramsfan
Sadly the problem is most likely the flat ribbon cable that connects the k/b to the c/b
i have seen a lot of htc phones having k/b and screen failures because of cheap a ribbon cable that is expected to be able to slip and slide hundreds and hundreds of times but will not.
You can try opening it back up and pull the connector at each end of the smaller (of the two) gold ribbon cables.
rarely (very rarely) cleaning and reseating connectors works , at first use a cleaned or new toothbrush, if that doesn't work dab a small amount of rubbing alcohol on the toothbrush,
Hope this works for you, if not you will need a new cable, then i suggest you stop using the slide out k/b because your video cable is next on the failure list and with most htc slide phones the video cable comes attatched to a pretty,clean and new display screen.
$$$$$$$$$$

[Q] Poor wifi and bluetooth signal after changing screen

Hi,
Several days ago I changed my screen and back housing on my HTC one ( the LCD itself was cracked so it was pretty unusable).
I've ordered the part from honk kong compagny (not sure if I can say the name of it here), and successfully managed to change them.
They claimed they parts are OEM, and they really looked like OEM.
So yesterday I connect my bluetooth speaker to my phone, and suprisingly the signal is really poor.
In clear air view of the speaker, at 1.5 meters, the speaker just disconnect.
And when I have the phone in my pocket, if I hold the speaker in my hand, I can hear it disconnecting a lot.
Same goes for my wifi, I can't get a strong signal except if I am next to the AP.
I didnt change the ROM since I changed my screen and housing so I guess this is not a software problem.
Do you know is there is anything I can do without opening it, or should I just live with it ?
Thanks for your time

Bump please

Nowahe67 said:
Bump please
Click to expand...
Click to collapse
sounds like you antenna is not connected or the wire got damaged

clsA said:
sounds like you antenna is not connected or the wire got damaged
Click to expand...
Click to collapse
Hi,
I had the same problem with an Asus Zenfone 2.
Do you think could be the coaxial cable antenna?
I am searching to change it because it's cheap. Any recommendations or tip about it?
Thank you

[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

No Audio after screen replacement

Hi,
I really need your help as I have no idea what to do.
After 1 month of using MI5 Pro Ceramic black I have broke my phone,First the touch worked and there was only vertical lines on the lcd in the spot of the shatter so I could operate but due to my stupidity and of force touching the broken glass these vertical lines started to cover all the screen (Everything worked well on the phone..Sound,Camera and etc..)
So I ordered from Aliexpress LCD + Touch screen for about 70$ (Included DHL Express shipment)
When I got the screen I started to disassamble the phone.. Got everything out,Took out the broken screen and pasted the new screen on the frame (Must say all these aliexpress screens are really bad,0% protection on the screen,Not sure about the LCD quality yet but glass is horrible..Started to scratch even before I used it)
Anyways to our point..
Started to assamble back everything.. Powered on the phone and Yay! Phone is working but...
No Sound,Firstly I checked settings and everything..Ran CIT test and everything that belongs to audio giving force close..
Calibrate Speaker PA test results : State-Get impedance failed!,Speaker Vendor-None
Vibration- FAIL no short and no long
Main mic speaker Feedback,Simulation call test,Front mic speaker feedback test,Top mic speaker feedback test,
everything when I enter it giving FC with that details :
"IlegalStateException:Unable to retrieve AudioRecord pointer for SetParameters() blablala...
Headphone mic feedback test (Called on an uninitialized AudioRecord)
So in short..
No Speaker,No Mic,No headphone Mic..
Now my question is what I need to do from now.. Its not firmware/software problem for sure as before I disassambled the phone everything worked well..
My first guess was the problem is on the Sub PCB but then I asked my self..If the USB-C is working and WiFI antenna giving full signal it means the Sub PCB works so what the hell is the problem? I really hope its not something in the PCB it self as it means throw everything to garbage.. ;<
Hope to hear suggests..
I thought to order the MI5 32GB Black version take out the Main PCB put the Pro Main PCB and put also the ceramic back cover but that I would do only if I know that the problem is from the sub PCB but if Headphone mic doesnt work (Which the Main PCB take care of) then its probably in the Main PCB??
Please help!

you didnt damage the pins on the press connector? is the press connector on the ribbon cable flush / fully inserted ? Are you sure you didnt kink the ribbon cable?
I haven't pulled a mi5 apart, but can only assume its like every other phone i have.

leighaus said:
you didnt damage the pins on the press connector? is the press connector on the ribbon cable flush / fully inserted ? Are you sure you didnt kink the ribbon cable?
I haven't pulled a mi5 apart, but can only assume its like every other phone i have.
Click to expand...
Click to collapse
The problem is that far as I understood of how the mi5 built and from how I saw it looks like..The Speaker located in the Sub PCB cover,Vibrate connected to subPCB,And all the SubPCB connected with the cable to the main PCB and I checked it connected good and no any damaged pins from what I was able to see..If there was damaged pins then the phone wont get charged as the USB-C wont be connected as it located in the SubPCB however it does work.. So I really have no idea what cause it..
Also the Headphone mic doesnt work in the tests..Anything related to Audio giving that FC with "AudioRecord" error..
I really must to know what causing it so I will know what to do ;<

Little update,
Just connected a bluetooth speaker,No any sound nothing..

Hi everyone! My MI5 has the same problems, no sound, mic, vibration, led buttons light, plugin earphones without notification's icon, can not play music, video offline and online video (Youtube, Facebook, live stream ..). It was happened when i replaced brooken screen. The first time when I turn on, evetything ok, I can play music through speaker, but now everything has gone..! Plz tell me how to slove this problem! Sorry for my poor E!

Hi, I ended up on buying the phone again... It's impossible to fix that problem as probably you did what I did and didn't place the motherboard correctly so a little bent probably happened and that cause to the problem.

edoroom said:
Hi, I ended up on buying the phone again... It's impossible to fix that problem as probably you did what I did and didn't place the motherboard correctly so a little bent probably happened and that cause to the problem.
Click to expand...
Click to collapse
Hi there! Care to elaborate a little more? I have also the same problem. I was replacing the rear camera module while the module I had received was broken to begin with. I hadn't really figured this out initially and I tried several times to attach it and test it, perhaps move the flex and retest, and at some I remember I found out the vibration was not there, but didn't pay attention to it as everything was open, until I found out the camera module was faulty in the end, and subsequently discovered also the whole issue with sound/vibration/key backlight etc. Instead of buying a new device, I was thinking to try and fix it, but still I'm a bit unsure about what the problem really was. From what I could figure, I didn't do anything different this particular time the audio/vibration didn't work, with respect to the previous times I attached and detached the motherboard. But is it definitely the board itself and not its flex connecting it to the sub-pcb? Could it be the sub-pcb itself or even both this and the board? In case I buy a new board (perhaps together with a sub-pcb just in case) to replace it which part should I watch out for, not to damage it again. Sorry for the many questions but you seem to be the only source of info for this specific problem.

deusxx said:
Hi there! Care to elaborate a little more? I have also the same problem. I was replacing the rear camera module while the module I had received was broken to begin with. I hadn't really figured this out initially and I tried several times to attach it and test it, perhaps move the flex and retest, and at some I remember I found out the vibration was not there, but didn't pay attention to it as everything was open, until I found out the camera module was faulty in the end, and subsequently discovered also the whole issue with sound/vibration/key backlight etc. Instead of buying a new device, I was thinking to try and fix it, but still I'm a bit unsure about what the problem really was. From what I could figure, I didn't do anything different this particular time the audio/vibration didn't work, with respect to the previous times I attached and detached the motherboard. But is it definitely the board itself and not its flex connecting it to the sub-pcb? Could it be the sub-pcb itself or even both this and the board? In case I buy a new board (perhaps together with a sub-pcb just in case) to replace it which part should I watch out for, not to damage it again. Sorry for the many questions but you seem to be the only source of info for this specific problem.
Click to expand...
Click to collapse
Hi sorry for late answer,I barley visit xda these times..
After I bought the MI5 again this time in the 64gb version I tested the old 128gb motherboard (The main one) and still same problem with Vibration/Sound (While all sensors work camera too)
Which means its not the sub-pcb problem,Its the main motherboard for sure,Now what cause it?
In my opinion when I pulled of the motherboard to put it on the new screen I insert it in a bad way which made it bent a little and probably the place I bent is where the audio and all the stuff goes on..
I'm pretty sure we cant really do something about that problem as problem related to motherboard it self are usually not fixable,But if you find something I will glad to get a feedback to test on my own bad motherboard so maybe I can back to the 128gb version ;| but I doubt it..

edoroom said:
Hi sorry for late answer,I barley visit xda these times..
After I bought the MI5 again this time in the 64gb version I tested the old 128gb motherboard (The main one) and still same problem with Vibration/Sound (While all sensors work camera too)
Which means its not the sub-pcb problem,Its the main motherboard for sure,Now what cause it?
In my opinion when I pulled of the motherboard to put it on the new screen I insert it in a bad way which made it bent a little and probably the place I bent is where the audio and all the stuff goes on..
I'm pretty sure we cant really do something about that problem as problem related to motherboard it self are usually not fixable,But if you find something I will glad to get a feedback to test on my own bad motherboard so maybe I can back to the 128gb version ;| but I doubt it..
Click to expand...
Click to collapse
Many thanks for the response! It sheds a little light indeed. I also ordered another phone to replace it as the cost of the motherboard seems to be equal approximately close to a new device. I'm with you, in the same view, I also once placed the motherboard quickly in the chassis without the screw that holds it together, in one of the 50 or so attempts to try and make the camera sensor I was replacing, visible to the OS, and this looseness was the unfortunate one perhaps (?). I too don't expect the sound to work again. I just wanted to double check the issue was not with the sub-pcb, which I did thanks to you. For sure I have no hopes for the mainboard to work again, but still, what keeps me from being certain it is actually the sound card that is the problem, is a very similar case I saw In a foreign forum, and also clues from my device which support the argument that the mainboard might have entered in a kind of diagnostic boot state due to a hardware fault that was apparent, where either some components are not initialized during boot, or their HW resources are taken over from the diag. ports and irqs that are enabled, in which case the issue can perhaps be fixed. For sure whenever I find a good deal on a new motherboard I will replace it, to keep it as a secondary phone, as I liked it quite a bit, but It would be interesting to see if this hypothesis holds or not. Anyway thanks again for the response!

Hi,
I've bought used mi5 with broken screen. After LCD replacement I've found that that phone has problem with sound. Exactly the same as in this thread - no sound, mic, vibration, led buttons light, plugin earphones without notification's icon, can't play music, video offline and online video (Youtube).
Someone already did LCD replacement on this phone and probably done something.
But what I discovered on this phone that problem start when battery charge aprox more then 60%.
I did flash one year old ROM via fastboot ( just to verify if it not the ROM problem) and after that everything was fine ( battery level 50%).
I did hardware test - passed 100% fine.
But when I did charge till 100% the problem come back.

That's really interesting finding... Can you tell me the same steps you did like which rom you flashed and all of that? I will check it with my dead phone maybe if I will have the same thing like you we can point on something...

mi5 lcd replaced touch not working
I bought a mi5 mobile in singapore. My display was damaged. I changed many display in india (checked in many shop). only work display (lcd). Touch not respose. please some one give solution. thank you

have same problem with op
my phone get damaged by water so im rush turn it off and open everything then go to dry it... and problem with speaker etc doesnt work just like op please help i really doesnt have money to buy new phone this month

Exactly same problem with me, just replaced the rear camera and the problem occurs
No sound, no vibration, nav led not working at all, playing video not working
Even playing sound via bluetooth speaker not working too
I believe there is something wrong with the mainboard
can anyone point out which part of the mainboard responsible for the lower board?
The lower board works well though, I tested it using other mainboard

codearm2 said:
Exactly same problem with me, just replaced the rear camera and the problem occurs
No sound, no vibration, nav led not working at all, playing video not working
Even playing sound via bluetooth speaker not working too
I believe there is something wrong with the mainboard
can anyone point out which part of the mainboard responsible for the lower board?
The lower board works well though, I tested it using other mainboard
Click to expand...
Click to collapse
For me the problem was that after the screen replacement (It may also apply to you after you replaced the rear camera..)
When I put back he main motherboard it wasnt sat properly,I put it beneath a small plastic holder and when I closed everything and screw and all..Problem appeared and when I rechecked motherboard I found out it got bent in the right down side and that's probably what killed all the sensors,sound and everything..
Of course that what happend to me..There is plenty of other reasons that may cause to what you experience..

edoroom said:
For me the problem was that after the screen replacement (It may also apply to you after you replaced the rear camera..)
When I put back he main motherboard it wasnt sat properly,I put it beneath a small plastic holder and when I closed everything and screw and all..Problem appeared and when I rechecked motherboard I found out it got bent in the right down side and that's probably what killed all the sensors,sound and everything..
Of course that what happend to me..There is plenty of other reasons that may cause to what you experience..
Click to expand...
Click to collapse
I believe the chip or something similar, that control the sensor, led, vibration etc, was broken because we put it the wrong way
now we need to find which chip it is and replace it
which part of the right down? near the signal cable?

codearm2 said:
I believe the chip or something similar, that control the sensor, led, vibration etc, was broken because we put it the wrong way
now we need to find which chip it is and replace it
which part of the right down? near the signal cable?
Click to expand...
Click to collapse
If you just checked and saw you put it wrong as I did,On the little plastic which made a little bent then I guess you lost..I would just buy new motherboard on aliexpress or just give up and buy a new phone..
As you cant really know (I mean from our side..) if its a chip related there or if its the bent it self which made problem on the connection on the board it self..
And yes I was speaking about the right side near the signal cable where you need to install the motherboard from that side where there is a little plastic like holding the motherboard..When I did the reinstall by not checking I put the motherboard on that plastic and after I closed everything and all screws got back I discovered that problem..

edoroom said:
If you just checked and saw you put it wrong as I did,On the little plastic which made a little bent then I guess you lost..I would just buy new motherboard on aliexpress or just give up and buy a new phone..
As you cant really know (I mean from our side..) if its a chip related there or if its the bent it self which made problem on the connection on the board it self..
And yes I was speaking about the right side near the signal cable where you need to install the motherboard from that side where there is a little plastic like holding the motherboard..When I did the reinstall by not checking I put the motherboard on that plastic and after I closed everything and all screws got back I discovered that problem..
Click to expand...
Click to collapse
yeah, it means it's the same mistake as mine, that little metal thing that hold the motherboard, I forgot to eject the sim card tray and when I pull my main board it was stuck, got a little bent from there
Just wonder if anyone have the schematic for mi5 mainboard, since I'm curious and want to find a way to repair it
Not because I'm in despair of needing a phone, this MI5 is my secondary phone
Just because of the curiousity, that's all
edi--
found the schematic here
https://data.dendik.id/Data/Schematic/Xiaomi/Mi5_SM.rar
now on the journey to repair this stupid mistake, lol
any help from someone who are an expert in this thing will be really appreaciated

codearm2 said:
yeah, it means it's the same mistake as mine, that little metal thing that hold the motherboard, I forgot to eject the sim card tray and when I pull my main board it was stuck, got a little bent from there
Just wonder if anyone have the schematic for mi5 mainboard, since I'm curious and want to find a way to repair it
Not because I'm in despair of needing a phone, this MI5 is my secondary phone
Just because of the curiousity, that's all
edi--
found the schematic here
https://data.dendik.id/Data/Schematic/Xiaomi/Mi5_SM.rar
now on the journey to repair this stupid mistake, lol
any help from someone who are an expert in this thing will be really appreaciated
Click to expand...
Click to collapse
ok bruh im already do some fking around and do ic audio replacement but no hope its still broke even my repair guy who are ex xiaomi worker are give up the problem is looks like from cpu its self but there was something interesting if u try download device info hw app in google play there was warning that the device cant read sys or something cuz it was blocked and when u look at audio chipset its was gone

feel2death said:
ok bruh im already do some fking around and do ic audio replacement but no hope its still broke even my repair guy who are ex xiaomi worker are give up the problem is looks like from cpu its self but there was something interesting if u try download device info hw app in google play there was warning that the device cant read sys or something cuz it was blocked and when u look at audio chipset its was gone
Click to expand...
Click to collapse
Yeah, tried it before, and the audio chip is gone
Perhaps something wrong with the audio chip, will try to replace the IC tomorrow

XZ3 WIFI and Network connection problem

Hi Guys, could you please help me out? A few weeks ago my XZ3 started to act weird. It working perfectly, and after a random time, suddenly its losing both the wifi and mobile network connection (bluetooth is OK). Sometimes a simple restart solves this, but other times its not helping. I tried factory reset, but the problem still occurs. Could it be somehow software related or it must be a harware issue? Any information could help a lot! Thank your very much in advance.

svep said:
Hi Guys, could you please help me out? A few weeks ago my XZ3 started to act weird. It working perfectly, and after a random time, suddenly its losing both the wifi and mobile network connection (bluetooth is OK). Sometimes a simple restart solves this, but other times its not helping. I tried factory reset, but the problem still occurs. Could it be somehow software related or it must be a harware issue? Any information could help a lot! Thank your very much in advance.
Click to expand...
Click to collapse
i got the same problem. and still stuck till now. did you found any solution?

Hardware issue.

svep said:
Hi Guys, could you please help me out? A few weeks ago my XZ3 started to act weird. It working perfectly, and after a random time, suddenly its losing both the wifi and mobile network connection (bluetooth is OK). Sometimes a simple restart solves this, but other times its not helping. I tried factory reset, but the problem still occurs. Could it be somehow software related or it must be a harware issue? Any information could help a lot! Thank your very much in advance.
Click to expand...
Click to collapse
It happened to me a few months ago. Have you trying to turn airplane mode on?

J.M.Siyath said:
Hardware issue.
Click to expand...
Click to collapse
what part of hardware causes this issue? is it repairable?

aizazkhan666 said:
what part of hardware causes this issue? is it repairable?
Click to expand...
Click to collapse
issue may be in chipset so repairing is hard.
I gave it to seller then he sent me another xz3 phone.
now I don't have such issue.
I think it is a manufacturing issue, few phones has this same issue in all Xperia models like xz2,xz3, xperia 1....

J.M.Siyath said:
issue may be in chipset so repairing is hard.
I gave it to seller then he sent me another xz3 phone.
now I don't have such issue.
I think it is a manufacturing issue, few phones has this same issue in all Xperia models like xz2,xz3, xperia 1....
Click to expand...
Click to collapse
i got it fixed from a local repair shop. The issue is caused due to some loose components on the motherboard. There are a bunch golden pins around the edges of the main board, the repair guy called them "signal boosters". i don't know what they're actually called. They're all connected to two main signal boosters right in the middle of the motherboard.

UPDATE: it's the plastic middle frame of the phone!! i finally figured it out.

svep said:
Hi Guys, could you please help me out? A few weeks ago my XZ3 started to act weird. It working perfectly, and after a random time, suddenly its losing both the wifi and mobile network connection (bluetooth is OK). Sometimes a simple restart solves this, but other times its not helping. I tried factory reset, but the problem still occurs. Could it be somehow software related or it must be a harware issue? Any information could help a lot! Thank your very much in advance.
Click to expand...
Click to collapse
I have the same issue.

aizazkhan666 said:
UPDATE: it's the plastic middle frame of the phone!! i finally figured it out.
Click to expand...
Click to collapse
What exactly did you do? replace the plastic middle frame? or repair it? how?

jimly_21 said:
What exactly did you do? replace the plastic middle frame? or repair it? how?
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I'm sorry it wasn't the middle frame either. the issue came back after a couple of weeks, mostly when phone got hot under heavy use. i figured when i pushed hard on the side of the phone where sim card lies, the phone would lose signal for a sec or two and then come back to normal
I finally managed to fix my phone somehow it hasn't dropped signal even once in two months. i haven't been able to pinpoint what exact component is malfunctioning that's why I'm going to list every little thing i did..
it's definitely one of the metal contact points on the edges of the motherboard near the sim card tray that connect with the phones casing to boost the wifi and 4g signal. i put a small piece of medical tape on top of each contact point near the sim card tray to completely block them off. ( I've marked in the attaced pic exactly which contact points you have to block )
I've also removed the plastic dummy sim holder that sits just below sim card tray to fill the gap between metal sim holder and phones body. put a piece of paper medical tape there instead. put a small piece of paper in the top right corner of phone housing so that motherboard would stay a little above the housing when you screw it (see pic)
make sure motherboard screws aren't too tight
Don't worry it has little to no effect on phones signal reception, you're only blocking the sub antenna

aizazkhan666 said:
I'm sorry it wasn't the middle frame either. the issue came back after a couple of weeks, mostly when phone got hot under heavy use. i figured when i pushed hard on the side of the phone where sim card lies, the phone would lose signal for a sec or two and then come back to normal
I finally managed to fix my phone somehow it hasn't dropped signal even once in two months. i haven't been able to pinpoint what exact component is malfunctioning that's why I'm going to list every little thing i did..
it's definitely one of the metal contact points on the edges of the motherboard near the sim card tray that connect with the phones casing to boost the wifi and 4g signal. i put a small piece of medical tape on top of each contact point near the sim card tray to completely block them off. ( I've marked in the attaced pic exactly which contact points you have to block )
I've also removed the plastic dummy sim holder that sits just below sim card tray to fill the gap between metal sim holder and phones body. put a piece of paper medical tape there instead. put a small piece of paper in the top right corner of phone housing so that motherboard would stay a little above the housing when you screw it (see pic)
make sure motherboard screws aren't too tight
Don't worry it has little to no effect on phones signal reception, you're only blocking the sub antenna
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Bro i followed your method but problem is still occur. What can i do to fix this?

[email protected] said:
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Same problem here...no wifi or gsm signal....i cleaned the contacts on mother board with alcohol but still nothing. Cant find motherboard to buy either. Just stupid.

kojak989 said:
Same problem here...no wifi or gsm signal....i cleaned the contacts on mother board with alcohol but still nothing. Cant find motherboard to buy either. Just stupid.
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So what you did at the end?
Any update on the matter?

I was able to partially solve my problem with my phone, I took out the black antenna frame and very carefully placed transparent scotch tape (because it´s thinner than medical tape) in all the contacts that are marked in red in the atached picture but now I´m thinking that I shouls have placed tape also on the places marked with green.
So what change I experienced on my phone with this method?
well the phone now has Network and wifi signal all the time and very ocassionaly it does lose the network and wifi signal for a second but when this happen the phone does not say that there is no sim card and does not freeze and restart, it just recovers signal by itself and I can continue using the phone.