Develop Bugs

Touch still unresponsive after digitizer replaced

About 2 weeks ago my touch function stopped responding. I was away from the night and it died shortly after and I did not have my charger. The next day once I got it charged up, I powered it on and was able to get a few minutes of working touch sense... then the touch died completely. I opened it up to make sure all of the cables were intact- Everything inside looked perfect except for the little latch that holds down on the digitizer cable was broken off, but that was already like that for a while and everything was still working.) After some fiddleing and no luck, I decided I probably just need to get a new digitizer--- It would be easy to disassemble because my lcd and digitizer were both oem from a drop in the potty a few minths back, which only affected the screen. So today the digitizer came in and I replaced it- NO LUCK! Every once in a while I get a tiny spark of scroll functionality or the bottom of the screen while in landscape mode becomes touchable for a few seconds, but otherwise dead.
Does anyone know what the problem could be since I have already replaced the digitizer???
Right now I am only able too hook up my internet sharing and etc. through MyMobiler.
Thanks

Touch screen non-responsive in the middle

My Desire Z had a fall, and has developed two problems
1 - The hardware keypad has started to take hard-press and sometimes prints double characters on single press. I think the alignment is out or something... any other guess ?
2 - The touch screen sometimes stops working from an inch up from the bottom and continues to half an inch. Before and after that patch, the touch always works fine . Mostly, the whole touch screen works fine. But when the patch gets non-responsive, I have observed that by turning the screen off and on a couple of times makes it work again. I am not very sure what the problem is. Any clues ?
Thanks

I'm also experiencing a similar issue - for me it's usually an area that corresponds to the top row of the
on-screen keypad (for unlocking) or the top of the area for unlock patterns (portrait orientation).
Mine is a 2 year old DZ w. Cyanogenmod 7.1
No HW key problems & no droppage.
Liberal application of isopropyl alcohol and a microfiber cloth - especially around the edges of the screen
seem to help a little bit but not often enough to be better than random.
Switching the screen off and on occasionally helps but most often I get annoyed and use the HW keys to
unlock.
I have noticed that, after powering on the device, the SIM-lock keypad works just fine but the (different)
screen-unlock keypad fails. This leads me to believe it to be a software issue.
/b

I have had this experience on my G2
No fix for me but his my experience check out the url!
http://forum.xda-developers.com/showthread.php?p=31264095
Sent from my HTC Vision using xda premium

Thread moved to Q & A section.

So i am going for Digitizer replacement will post the result when the phone is back.
And what about the Keypad taking hardpresses ? what can be the issue there ?

so my desire z is in the shop for repairs. lets see what problem is diagnosed.

I have read in another thread in this forum that the hardware keyboard (need to press hard on some buttons) issue can happen when the phone falls.
Apparently, the flat cable that connects the keyboard to the rest of the phone gets loose and causes such trouble.
Since your phone is in for repair, I'm sure this will get sorted when U get it back.

ok so my phone got back from repairs, the guy couldnt fix the touch-screen rather made it worse. Now the touchscreen doesnt work at all. So i cant unlock the phone and cannot test the Keyboard problem. The guy said the touch problem is related to the ribbon cable and not the touchscreen itself.
Note 1: He says he tried replacing the touch panel altogether but it didnt work.
Note 2: I still think the ribbon is fine (call it intuition)
Note 3: I am giving my phone for repairs again, but this time to HTC service center which would probably cost me a lot more than third-party repairs but at least it will get fixed.
I will update when I my phone back from HTC service center.

Could you not unlock the phone by opening the keyboard ?
It does smell to be an issue with flat (ribbon) cable to me as well. As if there was some loose contact before (caused by you dropping it), and after the repair guy took the phone apart, he probably made even bigger mess by ruining the flat cable completely.
From my experience (and I've claimed warranty 3x for the broken digitizer (touch panel)), if it's broken, an area of the screen (or the whole screen) will be permanently dead. It would not come back to life every now and then.
btw, mine always started being unresponsive in the very middle of the screen, a bar of height around 1 cm (somewhat less than 1/2 inch). Each time they replaced the digitizer.
If it;s the flat cable, you shouldn't end up being charged too much - those thingies are very cheap (in China) and the labour will probably be the majority of the price. Fingers crossed.

So I got my phone back again... The HTC repair center was not located in my city so I went to another (better known) repair shop. The guy said, "your phone hasnt been opened at all from the touchscreen side, any *repair guy* who claims he has opened it and tried this and that but couldnt fix is simply lying. This said, he opened up my desire z replaced its Touch Panel and voilah! my desire z is sensing again in 15 mins

What's the status for the keypad and need to press it hard to work ?

nope... I had it cleaned using alcohol / thinner. now it works fine.

So, I updated to CM 7.2 last night but the touchscreen problems are still there.
Updated using CWM and deleted data & cache whilst doing so.
I really hate the prospect of getting a new phone as the current models available
in DK are all without physical keyboards

Touch doesn't work after disassembly

Hello,
Today I disassembled my LG G4 to change the camera. I followed tutorials online and this is the second time I'm repairing this phone.
Previously I've repaired two other phones.
I disconnected all connectors (back and front cameras, display) removed the motherboard from the frame and put the new camera in.
After that I put the motherboard back and connected the things back. The device booted up fine but sadly the touch on the screen wasn't working.
Display worked fine, using a mouse and keyboard I even tested the new camera.
I disassembled and reassembled the device a few more times. The screen connector has no visible damage however the touch is not working no matter what.
I tried starting it without cameras connected, no change.
Any ideas? Am I missing something?

pepo930 said:
Hello,
Today I disassembled my LG G4 to change the camera. I followed tutorials online and this is the second time I'm repairing this phone.
Previously I've repaired two other phones.
I disconnected all connectors (back and front cameras, display) removed the motherboard from the frame and put the new camera in.
After that I put the motherboard back and connected the things back. The device booted up fine but sadly the touch on the screen wasn't working.
Display worked fine, using a mouse and keyboard I even tested the new camera.
I disassembled and reassembled the device a few more times. The screen connector has no visible damage however the touch is not working no matter what.
I tried starting it without cameras connected, no change.
Any ideas? Am I missing something?
Click to expand...
Click to collapse
You can try cleaning all the internal connectors with 90% Isopropyl Alcohol but if that doesn't work and you're sure that all connectors are clean & solidly connected, you may have to replace the Touch Screen Digitizer (with frame) in order to solve.
Replacements aren't that expensive - google it for local supply or check out: https://www.aliexpress.com/item/For...lgo_pvid=2fd011e4-25cc-4cd1-a57f-b7878b272ca7

Thing is I don't know if the problem is motherboard connector or screen ribbon.

Touchscreen not working at all - phone is otherwise fine. What to do now?

Hi.
I would be really grateful for some advice.
I bought this phone (64GB version) in December 2019 (so out of warranty) and have been really pleased with it.
I scratched the screen, quite badly, about 3 months ago but it has been completely fine.
The phone was in pocket, when I was out in the rain the other day, and I noticed that the touch screen was completely unresponsive.
I tested the phone, with a mouse and an OTG USB cable, and it works completely fine - i.e. other than the touch screen not working, the phone is completely fine.
My question, now is what to do.
I have tried to dry the phone out for 48 hours (as recommended), but the screen will not work at all.
A few questions:
1. Is there any way I can check the phone for an error code in respect of the screen?
2. How much would it be to have a replacement screen replaced?
3. Is there a possibility that the screen is fine, but there is something on the phone's board that is in fact at fault?
4. Should I consider, economically, to just get a replacement instead - either the same phone or something else?

elsmandino said:
Hi.
I would be really grateful for some advice.
I bought this phone (64GB version) in December 2019 (so out of warranty) and have been really pleased with it.
I scratched the screen, quite badly, about 3 months ago but it has been completely fine.
The phone was in pocket, when I was out in the rain the other day, and I noticed that the touch screen was completely unresponsive.
I tested the phone, with a mouse and an OTG USB cable, and it works completely fine - i.e. other than the touch screen not working, the phone is completely fine.
My question, now is what to do.
I have tried to dry the phone out for 48 hours (as recommended), but the screen will not work at all.
A few questions:
1. Is there any way I can check the phone for an error code in respect of the screen?
2. How much would it be to have a replacement screen replaced?
3. Is there a possibility that the screen is fine, but there is something on the phone's board that is in fact at fault?
4. Should I consider, economically, to just get a replacement instead - either the same phone or something else?
Click to expand...
Click to collapse
Check Developer options > Show Taps to know where the tap location of screen not working. If it has 'dead touch' partially or all of it, the digitizer or the touch layer is damaged. Mine was damaged at the right edge of screen where it did have a row of dead touch. I did replace mine. I recommend Screen + Frame package rather than screen only or even difficult touchscreen only.
It did cost $20 + $2.99 shipping on our online shop (Lazada, a Southeast Asian AliExpress affiliated online shop) for replacement of screen + its frame package. The risk is that it is not original screen anymore (not made by Xiaomi glass) and sometimes, it's a lottery to get working screen. You can do it yourself or assist it with your friend (or technician) who knows how to replace phone's screen.

Screenshot of the said developer option

Question No Wifi - No cover Screen - LG U+ Logo?

Hi All,
I had my Fold 3 like 6 months ago, and it was weird at the beginning as it was showing LG logo on while booting, however it was working fine with absolute no issues.
now, out of the blue, the cover screen does not work at all, and the WIFI toggle does not get switched on whatever I do.
The speakers (loud and inner ones) only work work the phone unfolded or semi folded, the don't work if it is unfolded on the inside screen.
The cover screen touch works, tried to play a youtube video on the main screen and I unfolded it, I can still pause and resume but only because I know where the icon should be, but the screen has no data as if it is locked.
I think it is a Korean version that I bought from Dubai.
Model: SM-F926N
I have tried resetting network settings, uninstalling the additional apps that cam with it, reset the whole phone to factory settings, uploading a new updated stock rom, nothing works at all and I don't know what to do now.
I downloaded the recent firmware update via mobile data hoping that it would fix the issue, but nothing! now the device is running One UI 5.1.
Baseband version: F926NKSU2FWCC
any suggestions?

Doesnt have anything to do with Lg logo. Your problem is flex cable broken. How many folds per day do you usually do? For it to break the flex cable under the hinge

okokokokokok12 said:
Doesnt have anything to do with Lg logo. Your problem is flex cable broken. How many folds per day do you usually do? For it to break the flex cable under the hinge
Click to expand...
Click to collapse
I actually used it slightly more than 2 months. I have a Fold2 and I'm using it intensively since bought in 2020 with no issues at all.
Would the flex cable be the reason for not getting the wifi to work too?

SElGhamrawy said:
I actually used it slightly more than 2 months. I have a Fold2 and I'm using it intensively since bought in 2020 with no issues at all.
Would the flex cable be the reason for not getting the wifi to work too?
Click to expand...
Click to collapse
Flex cable is the reason why wifi, speaker , bluetooth , s pen is not working and finally the inner screen will have black line because when the flex cable gets totally cut and it will hit the inner screen. Service center charge 600$ they will replace the entire screen together with attached flex cable they will alreplace the housing , battery and even hinge. Basically you will get a new phone except for motherboards, camera, back glass, front screen

SElGhamrawy said:
I actually used it slightly more than 2 months. I have a Fold2 and I'm using it intensively since bought in 2020 with no issues at all.
Would the flex cable be the reason for not getting the wifi to work too?
Click to expand...
Click to collapse
I am impressed that your Fold 2 is still running perfectly since you had it for more than 2 years.