screen has become unresponsive to touch,except the very bottom back/menu buttons.
*#2663# gives "unfortunately device keystring has stopped"
adb shell command gives same error
can it be updated with any different commands?
putty,terminal etc
Thanks
Had this on my Note 5 AT&T version. Been searching around google and no one found an answer, but mine works now.
Symptoms:
Touch screen not working, but s pen is able to work
*#2663# shows "DeviceKeystring has unfortunately stopped"
Capacative buttons (back and...menu?) work on both hand touch and s pen touch
I updated the TSP firmware earlier in the day, but that didn't fix the problem. Neither did wiping the cache from the recovery menu or any combinations of restarts, disconnecting the battery (inside the phone), a malware scan, and disconnecting the LCD screen and digitizer hardware (it had lint in the connector, but it still didn't work after cleaning). I started to see the Device Keystring crash after trying to access *#2663# again after I first updated the TSP firmware.
(I should note that I my LCD screen and digitizer are not the originals. I replaced from from a part I purchased from ifixit in Feb 2020.)
I don't know exactly what it was here that made it work, but this round of troubleshooting got it working. I saw that device keystring wasn't running in my Package Disabler app and had no data, so I disabled it and re-enabled it. I also tried to change the "scroll speed" setting under Input from android settings to the max. I disabled the samsung keyboard and re-enabled it. I made samsung keyboard the default keyboard and then set it as input. After a reboot, it works now. I'm still not sure if this was hardware or software since my phone was disassembled while I was working on it (maybe it was a loose connector that got bumped into place?), and I only started having touchscreen issues after using my new case which really clamps down on the phone.
Hopefully that's useful to someone out there. I wish I found a more definitive answer, though. Every forum where I saw this issue has no replies.
Related
The touch sensor in my TPT (the first lenovo android tablet) seems to have failed. It stopped working mid session, but not while touch input was actively being used. I had it running as a reference monitor and when I touched it to move an image it did not respond.
Since then I have been able to get it working erratically:
First test was shaking the device, sometimes it started working again, and continued working for that session, but if I came back to it after setting it down it would not function again.
This lead me to believe it was a wiring issue. As my warranty long ago ran out and I had already had to open it up to fix the power button, I opened it up again to play around with.
Next test was repeating the shaking test, this time moving only the detached display portion while the body was stationary. This sometimes results in it functioning again, same results as before.
Searching the part numbers, I found that "C54-90-00051C0" was part of the touch sensor, so I removed and reseated the cable connecting that part to the body. Since then I have not been able to get the touch fully functioning, but instead of an on/off fully functioning or not, it seems to work in spurts, eg I can get the touch lock to move around occasionally, but I've never been able to actually unlock and operate the device via touch inputs.
I haven't made any progress since then, only rechecking the connection on that wire - though it is a ribbon wire with no tactile feedback on whether or not it is fully seated as far as I can tell, so it's not clear if I'm messing with that properly.
Can I get any help, pointers, workarounds, etc?
Hi,
I have recently bough a Nook Simple Touch with Glowlight (BNRV350). Used, no guarantee. It looks fine (has only a minor scratch on the light dispersing layer). Problem is - the lower half of the touch sensors give misplaced readings. For example - during the registration process I cannot get through the language selection screen. I can correctly mark English, but when I want to press an arrow to go further, Nook changes my mark to French, instead of getting me to the next screen. Cleaning borders of the screen with microfiber cloth and cotton swabs did not help.
I have another NSTG working fine, so:
1. I tried to copy its stock system backup and loading it to malfunctioning one. It didn't help. I could not even unlock the screen (although I could press "power off" or "cancel" buttons after holding power button).
2. I tried swapping mainboards (IR sensors are on them, not in the screen assembly). And It turned out, that wherever mainboard of the faulty unit is, the touch does not work properly. I tried to blow out the dust from those misbehaving sensors hoping that it just somehow got on the motherboard, but it did not help either.
So the question is: What else can I do to make those IR sensors work properly?
Thanks in advance for looking into the problem!
(Sorry for my English, I'm used to reading, not to expressing my thoughts with it.)
Maybe try to look on the sensors with a cellphone camera in dark room-then probably you will see which of the ir leds aren't working (if the problem is in leds not the sensors)
Sent from my Lenovo P780 using Tapatalk
Unfortunately I couldn't find any camera able (tried mobile phone, point'n'shoot, DSLR...) to detect IR in their stock configuration (and messing up with disassembling the sensor filters seemed as not worth the case). I ended up buying another NSTG with shattered eink screen and salvaging its properly working mainboard (+completely fine battery, all for about $7). Problem solved. Kind of.
If you are having problems with the touch screen try using the app posted here:
http://forum.xda-developers.com/showthread.php?p=52723066#post52723066
It may give you insight into where the problem is.
It will help us get an idea of where problems are occurring.
Thank You. I've read about Your program, but since I could not even unlock the screen or get past registration wizard (when trying to get that unit to factory state) I was unable to use it.
The Menu button (when you mapped) gets past the swipe.
You can start stuff with ADB intents.
Hi everybody,
I have a somewhat reversed question. I recently broke my screen, and ordered a new digitaliser + LCD screen from AliExpress. The thing works perfectly and looks marvelous, and before mounting it I decided to test it and the digitiser and screen worked perfectly fine. Now, I glued the new screen to the chassis and booted the phone and it seems that half of the screen refuses to work. The top half works, the lower part doesn't and the soft buttons work again. According to the different fora I searched on for more information, this might be a software issue (since the digitiser worked perfectly fine before). When I attached the screen the first time the phone showed this "Touchscreen firmware update in progress" thing. Seemingly, this is the calibration phase the phone goes through to fix any calibration errors.
Now, I want to force the phone to go through this phase again, but for some reason, before every time when I had the previous screen and digitiser it went through this every single time I upgraded the rom, but now it doesn't do that at all.
I reinstalled different recoverys: TWRP and CWM (no calibration phase), I reinstalled different ROMS (cyanogenmod and Paranandroid) and I installed different modems (4.1 and 4.2), none of them had the result of pushing the phone into the "touchscreen firmware update in progress" phase. Any idea or tips how I could get the phone into this process?
Thanks a lot for your help!
Hello,
Since a few days, the touch input of my front (LCD) screen stopped working. Nothing looks damaged, the screen still displays what it is supposed to, but there is no reaction to my inputs (actions on volume and power buttons do work, as well as on the e-ink screen). Did this happen to any of you? Any suggestion on possible ways to fix it?
I should also mention that it still works by moments, like half a day working, then 2 days not responding, etc. I tried shaking it in different ways should a connector be slightly displaced, with no success: the few times it started working again came like a (good) surprise. I also had the great idea to do a factory reset, so now the phone is stuck on the Android configuration wizard, which must be done on the front screen (no possibility to use YotaMirror, apparently).
Thanks!
wicoz said:
Hello,
Since a few days, the touch input of my front (LCD) screen stopped working. Nothing looks damaged, the screen still displays what it is supposed to, but there is no reaction to my inputs (actions on volume and power buttons do work, as well as on the e-ink screen). Did this happen to any of you? Any suggestion on possible ways to fix it?
I should also mention that it still works by moments, like half a day working, then 2 days not responding, etc. I tried shaking it in different ways should a connector be slightly displaced, with no success: the few times it started working again came like a (good) surprise. I also had the great idea to do a factory reset, so now the phone is stuck on the Android configuration wizard, which must be done on the front screen (no possibility to use YotaMirror, apparently).
Thanks!
Click to expand...
Click to collapse
i recommend reflash it. possibly and more strongly recommend to flash the same version and region which was installed for example HongKong 4.4.3 baseband number .HK1.0.36a
ftp://fw.ydevices.com/YotaPhone2/Firmwares/
Actually, I forgot that the front screen was replaced several months ago (by a repairer that mistakenly changed the front screen instead of the e-ink one which was having an issue).
The factory reset didn't improve the situation, the front screen becoming "touch-insensitive" every few days. After checking how the screen connectors are supposed to be plugged (opposed to the screen), I noticed that gently tapping the phone front screen down helped to solve the issue each time it happened. A few days ago, I finally opened the phone (quite easy, there are two useful videos online) and unplugged/replugged the screen connector. It has been working fine since then.
If it happens to anybody (who would have its front screen replaced), I hope it can help!
My Note 4 SM-N910T3 Android 6.0.1 has an unresponsive strip in the middle of the screen. Landscape and portrait mode no change, safe mode reboot no change, factory data reset no change, installing fresh rooted touchwiz rom no change installing factory touchwiz no root no change. It is always there. I uploaded a couple of screenshots with Developer Options / Show Pointer Location enabled so you can see the missing strip. It becomes a huge nuisance some apps think I'm trying to zoom (hence the zoom percentage square) in one screenshot, scrolling is problematic in either screen orientation. Just trying to see if there is anything I can try before replacing my touchscreen / digitizer. I loved this phone and I have the ZeroLemmon extended battery, case, clip, and many other accessories that go great with this phone. Yes there is a similar thread but does not address my problem. It is not App related. Just trying to get some possible insight before replacing my screen and possibly having same issue. BUT MAINLY I HAVE MY VIPER4ANDROID ON IT THAT I CAN NOT GET WITH MY NEW GALAXY A10 (NO OEM UNLOCKING OPTION)Thanks for your time.
Jsmor1313 said:
My Note 4 SM-N910T3 Android 6.0.1 has an unresponsive strip in the middle of the screen. Landscape and portrait mode no change, safe mode reboot no change, factory data reset no change, installing fresh rooted touchwiz rom no change installing factory touchwiz no root no change. It is always there. I uploaded a couple of screenshots with Developer Options / Show Pointer Location enabled so you can see the missing strip. It becomes a huge nuisance some apps think I'm trying to zoom (hence the zoom percentage square) in one screenshot, scrolling is problematic in either screen orientation. Just trying to see if there is anything I can try before replacing my touchscreen / digitizer. I loved this phone and I have the ZeroLemmon extended battery, case, clip, and many other accessories that go great with this phone. Yes there is a similar thread but does not address my problem. It is not App related. Just trying to get some possible insight before replacing my screen and possibly having same issue. BUT MAINLY I HAVE MY VIPER4ANDROID ON IT THAT I CAN NOT GET WITH MY NEW GALAXY A10 (NO OEM UNLOCKING OPTION)Thanks for your time.
Click to expand...
Click to collapse
try *#2663#
tsp fw update
Thanks for the info but I failed to mention I have tried that in my post a above. I appreciate it and maybe it may help someone else having this problem.
I had a similar problem after replacing my USB board. In that case, because the replacement involves separating the glass from the screen and fiddling there, I assumed I broke something.
I think this is a hardware problem, and you need to either reposition the touch screen, or get a new screen, or get a new phone... (I did the latter, since there's so little difference between the price of a good new screen and the price of a note 4).
What I did before replacing the phone was use the smallest on-screen keyboard I could find (swype), and if I wanted to scroll, always from the top. Notice that in my case pen still works nicely, so sometimes I would just get the pen out.