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My phone decided to not switch on any longer. The only sign of life is the notification led blinking red when is in charge, no way to access it with any program if I attach it to the PC with a USB cable.
I should send it to the Sony repairing center (still under warranty) but the phone is rooted; given its situation do they discover it ?
I had that exact problem. Turned out that the battery suddenly died after about a year.
In my experience they never care what stuff is currently on the phone. Instead they'll just flash it with the latest stock rom after fixing the hardware.
Thanks a lot for sharing your experience. I really hope will be the same in my case as well. I'll post here what will happen.
PS I'm wondering about the batteries' quality: my daughter with a z1c had your same problem (a little more than one year life), you, may be myself... I know the sample is not significant but...
Same thing happened with mine & i was on a custom rom with unlocked bootloader...they probably had no way to get into the phone just like i couldn't so they probably couldn't tell it was modified...it was just a brick at that point...i noticed certain batches were affected by this sudden death and after pulling my tag out i noticed my phone was part of that batch that was poorly assembled in china...so brand new phone for me!
Fictional Reality said:
Same thing happened with mine & i was on a custom rom with unlocked bootloader...they probably had no way to get into the phone just like i couldn't so they probably couldn't tell it was modified...it was just a brick at that point...i noticed certain batches were affected by this sudden death and after pulling my tag out i noticed my phone was part of that batch that was poorly assembled in china...so brand new phone for me!
Click to expand...
Click to collapse
OK, another positive experience. I cross my fingers and I'll post what will happen to me
I have the impression they dont even check the software, they just flash a new fw and thats it. Or they dont care.
My phone locked up on me like this, but I solved it by pushing a pin into the reset button hole.
Geoff2 said:
My phone locked up on me like this, but I solved it by pushing a pin into the reset button hole.
Click to expand...
Click to collapse
Thanks for the suggestion but I tried any possible way to resurrect my phone, including what you're saying, without any result. I hope to confirm soon what all the contributors to this thread are saying...
Just received the device from assistance; everything went well: the motherboard was replaced.
The only drawback is that the lost the tiny grill that cover the mic at the bottom of the phone !!!!!
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
There were discussions and I saw lots of examples of possible solutions.
About 1 month ago, MI 9 turned itself off. I tried to boot it by power button, it started, but after few minutes it turned off again by itself with no possibility to boot it.
Okay, after few hours, I found the Volume up, Volume down and Power buttons to be simultaneously pressed, to boot it, so I tried. It started with message "The system has been destroyed". I pressed Power button once, turned it off, then again, by Power button turned it on. No data lost. All there, it did look okay. Phone booted correctly.
After few days same issue, same solution.
Then again and again, more frequently. Then I saw that I need to use hair dryer to heat it a bit, to be able to boot it.
I saw many discussions, including those here that are saying about MIUI version to be related to the issue. I don't think so.
Some users told that they finally had to send phone to service, they were told later that motherboard was replaced in order to fix the issue. I must say that issue does not look to be very rare. I saw that many MI 9's were affected (based on discussions), and, number of online shops (electronic) were selling THE motherboard for $120+. Clearly, it is visible that there is production, factory problem of one phone part.
In car (and not only car) industry, when there is a factory issue with specific part, all units were brought back to production for the bad part to be replaced, units already sold as well.
I exchanged few e-mails with Xiaomi support. First I got very generic answers. Then answers were more precise, but still not clear that they clearly recognize factory fault.
I do not have Xiaomi service close to me, so I may need to send it by mail, which I would not do (costs may be, politely said, unexpected, as they may put to the paper everything was replaced). I can bring the phone to the seller, where I bought it, to get the same unexpected results, costs up to the phone price or more, as they may put to the pricelist what they want (again not easy to trust someone who does not want to recognize own factory faults).
Clearly, this will for sure, limit my readiness to buy Xiaomi again.
Just to mention, I am having the phone turning itself off every day for more times, which is making it useless. Starting, booting works only after a bit of heating it and pressing it a bit (torque), which tells by itself that phone has some mechanical issue inside.
I would like to ask if anybody has same or similar issue and what may be resolution?
Thanks a lot.
Somehow, it looks that some series of MI 9 has the factory error on itself.
It seems that problem is mechanical, based on some construction issue.
If I am able to somehow, turn the phone on, doing next step is turning the phone off: slightly pressing upper phone part clockwise and at the same time lower phone part counterclockwise, making torque, is turning the phone off.
So, inside the phone there is electronic / construction issue, it may be related to cable, connector.
Contacting Xiaomi, with exact problem explanation is useless, I have to say that I am really disappointed in relation to everything about this phone and Xiaomi now (initially, phone worked amazingly good).
Anyone has the same issue with MI 9,or some other Xiaomi phone?
That definitely happens to me , if I double the chassis would work
Is the screen? Is the motherboard , is the chasis?
Obviously a manufacturing or design defect if multiple users are experiencing this.
May be limited to just one batch or production run, hopefully.
I removed then placed back, rear battery cover. Then, I removed and placed back upper board and battery. Next, I tried to remove and place back upper board, battery and lower board. Finally, I removed and placed back upper board, battery, upper underlying part, lower board, lower underlying part. After every single step I checked, same issue (behaving same way as I described in previous note here) - there is some badly constructed part, having loose connection. I did not try to remove screen yet.
Yes, it really is factory, production problem.
At other side, every manufacturer may make an issue in production. And there is a difference between good and bad companies.
Xiaomi can make great phones with Terapixels ( may be in near future!) of cameras and Terabytes (not so near future!) of RAM, still, if they do not recognize and have proper, correct answer to their own manufacturing errors, they are just bad.
I exchanged few e-mails with Xiaomi itself. What I got was generic, almost robotic answers. Spending time when preparing e-mails I am explaining the issue to them was total waste of time. Somehow, seems that they know about the problem but they do not want to recognize that.
And, more. Spending money to Xiaomi MI9 is waste of money. Again, phone has some really great capabilities and if it is working well, it seems to be good. When it is not working good, it's disaster. And, as it is clear, it is not rare. Many users of the phone are having this issue.
Minimum what may be expected from Xiaomi is to announce publicly that there is the problem on those and those Xiaomi Mi 9 phones, with Serial numbers starting at this or that and those phones will be replaced immediately with no questions at all.
Asking for too much?!
Maybe it can be the ic chip or the cpu , which need a reballing
Does not matter what you write to Xiaomi, generic, robotic answer is their response.
Hello, Greetings from Xiaomi Customer Support! This is GenericName.
We at Xiaomi values your trust and we apologize for the inconvenience. Rest assured that we'll assist you on this.
This is not what we expect for our customers to face it. We at Xiaomi always work hard and strive to provide our customers with the best quality products, and nothing is more rewarding than to hear from a happy customer. It's unusual to receive such an incident from our customers with all the care and attention that we give to everyone. However, I would request you to coordinate with the respective point of purchase for better and quicker support.
If you have any other questions, welcome to visit again. Always believe that something wonderful is about to happen!
Follow [email protected] to get latest product tips and service information. https://twitter.com/XiaomiSupport
Best Regards
GenericName
Got few of those; this reply came today.
Help me please. Just now my Redmi 9T doesn’t want to open after I accidentally rebooted it after charging. I already tried the long press power button also the volume up and down.
Is it overheated?
Will it power on with the charger connected?
It’s not over heated. No, the power won’t open even if I tried to charged it again. My friends said that it’s dead boot and idk what that is.
Sounds like a mobo failure.
Maybe someone here has seen this before.
Someone said from a group that it’s a system failure update.
maeyyang said:
Someone said from a group that it’s a system failure update.
Click to expand...
Click to collapse
Bricked? Damn...
I don't update my 10+... now you know one of the reasons why.
You may have no other option but to bring that thing to a service center near you
@maeyyang can I ask if you updated its system prior to the incident?
I also am encountering this problem you posted. How's your phone now?
I also facing this issue.. any updates on your device?
Delabytes said:
I also facing this issue.. any updates on your device?
Click to expand...
Click to collapse
brought it to the nearest service center, they said i have to wait for 1-2 months :/
they said that it's a mainboard's problem
I search videos on YouTube. The same issues occurred on Poco M3. They said that the issue is on the main board, specifically the power IC.The solution is just reheating the soldered IC on the board.
Here is the sample video:
Delabytes said:
I search videos on YouTube. The same issues occurred on Poco M3. They said that the issue is on the main board, specifically the power IC.The solution is just reheating the soldered IC on the board.
Here is the sample video:
Click to expand...
Click to collapse
That's a BGA. The heat has to be precisely controlled with a hot air station by someone that knows what they're doing. Too little heat/time nothing happens, too much you destroy it and the PCB maybe too.
These are the hardest SMs to deal with.
There's no guarantee that that's the problem and no way to inspect it without a factory test rig*.
All the contacts are underneath. It maybe another SM component that has the cracked solder joint. There are a lot of components in the power section. That maybe a common problem but not the only one...
*you can try gently pressing down on the chipset to see if it triggers an event.
I think it's better to just take it to the service center for the mainboard replacement and I heard about users who did the same method in the video had recurring problems after doing that.
Opening the back cover of the handset also voids the warranty and that's really bad.
derunheimlich said:
I think it's better to just take it to the service center for the mainboard replacement and I heard about users who did the same method in the video had recurring problems after doing that.
Click to expand...
Click to collapse
FYI: I already posted the same thing on r/GooglePixel, it can be found here:
- Sometimes on startup the phone displays that System UI isn't responding, and at other times System UI actually stops, showing no status bar and a black homescreen background. The phone proceeds to soft-restart and the problem persists. This happens even after I factory reset the phone, either through settings or through recovery mode. I tried re-installing the OTA update using ADB and a .zip file from here.
- Sound isn't working, neither the earpiece nor the bottom-firing are making any noise.
- When resetting the phone in recovery mode, I noticed this message:
E:can't send spi message try again
yet the reset supposedly happens without problems. I suspect this to be a security thing and this could be a main cause of my issues.
- I bought this phone as a spares and repairs item for cheap, that might be a dead giveaway to how screwed up it is
- It's on Android 12, the November 2021 update to be specific.
- Boot time in general is long considering the age of the phone
My main worry as of now is whether this is a software issue or a hardware issue. It would be great if this can be fixed through software like downgrading the OS perhaps.Sorry if this post is a bit long, I just wanted to document it as well as possible for anyone who is in a similar situation.
HELP.
Update:
Turns out that even flashing a full image instead of OTA doesn't solve the issue. I tried Android 10, 11 and 12 and used both manually downloading the image and flashing it through my computer's terminal, and using the Android Flash Tool online.One thing that did kinda help is changing the wallpaper from the stock live pixel 4 one. That removed the "SystemUI isn't responding" message. But the bootloop still occurs after I put the phone to sleep.
Sounds like a mobo failure... sorry.
A custom rom might bypass the area of damage... or not.
With the millions of semiconductor junctions alone it never ceases to amaze me these devices are as reliable as they are.
blackhawk said:
Sounds like a mobo failure... sorry.
A custom rom might bypass the area of damage... or not.
With the millions of semiconductor junctions alone it never ceases to amaze me these devices are as reliable as they are.
Click to expand...
Click to collapse
Guess this phone might be completely screwed up after all...
ukasa said:
Guess this phone might be completely screwed up after all...
Click to expand...
Click to collapse
Take a look inside. Make sure the battery has enough capacity to meet power requirements.
Depending on the phone sometimes a failed (or wrong part) C port PCB can cause bizarre behavior.
Look for bad contacts on the ribbon cable connectors, solder cracks, etc.
-Gently- flex the mobo, chipsets while booted to see if you can provoke it. A pencil eraser works well.
Unfortunately the BGA chipsets solder joints are impossible to inspect, use care flexing near them!
Look for mistakes from previous repairs.
Make sure all ground pathways are good, some devices use unconventional methods like the frame rail or even a slightly longer through screw.