NON-Standard touch problem - Nexus 7 (2013) Q&A

Well,
Last month my NExus 7 2013 32 GB (wifi) had stopped working - it just freezed and after reboot got very hot and stopped at google logo. After one week of fighting , going through the depths of internet: xda, google & other sites I`ve decided to replace motherboard as it seems the emmc 32 gb memory got broken by itself. I`ve received new motherboard (with 16 GB emmc this time as it was 40USD instead of 80USD for 32 gb version) and installed correctly with a little help of ifixit teardown and youtubes.
It booted fine, all the buttons are working, but now I got this strange touch issue: the digitizer dont recognise my touch in a certain part of the screen - I`d say its 3mm wide line a little down from the top of the screen when in portrait mode.
I tought I did something wrong when putting parts together so I replaced new ribbons which came with new motherboard for the old ribbons from old motherboard. No luck here - this didnt resolve the problem. I also did install multi-touch-fix I came up here on xda some years ago (boot-ts12-lock.img worked for me fine). This also didnt change anything.
When I was replacing the motherboard I did it very carefully and I`m sure I didnt break anything - also I`m sure that before my old motherboard went down, the touch was working very well.
If anybody knows what I could do to save my little precious nexus from throwing to garbage, please help.
I`ve attached a screenshot from touch tester for all of You to see what I mean. Please note that some minor touch registered on this non-working part of screen are most probably some ghost touch as when I move my finger over that part of the screen it doesnt record anything.

Related

Can't allign my screen.

Hey guys!
I'm experiencing a very strange and annoying issue with my BA, and I was wondering if I could get some input from you.
So, here goes:
The touchscreen (not LCD) in my unit was broken, and thus I decided to fix it. I purchased a new one off eBay a few weeks ago, and just yesteday I proceeded to install it. To my surprise, something seems to have gone wrong.
I power up the unit, make my way into "Allign screen", and then the last "cross" that I have to touch rarely clicks in. On the other hand, when it does get detected, it simply restarts the alligning process.
What I've tried so far:
- allign right after installation -> no luck
- hard reset (on WM2k5_v4_R2.1) -> no luck again
- opened up the unit again, repositioned the screen -> nothing
- upgraded to Logout_WM2K5_5.4.03_HN -> still nothing
Right now I'm out of ideas, and I was hoping somebody here has some. Do you think the new touchscreen might be flawed ? I'm already discussing this issue with the seller.
Thanks for reading
New touchscreen or a refurb? Same type? (toppolly / sony) Sounds like it's been stripped from an old unit to me as it's not recognising the taps in the right places - can you see somehting like a liquid spill anywhere on the panel? This is what it looks like when the overlay touches the glass.
Richard
http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=9720199180&rd=1&sspagename=STRK:MEWN:IT&rd=1
That was in fact my auction. Looked like brand spanking new to me, not one single stylus mark, and also had the protective sheet on. Of course, I might be wrong
Also, no liquid spill visible anywhere.
NSD said:
http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=9720199180&rd=1&sspagename=STRK%3AMEWN%3AIT&rd=1
That was in fact my auction. Looked like brand spanking new to me, not one single stylus mark, and also had the protective sheet on. Of course, I might be wrong
Also, no liquid spill visible anywhere.
Click to expand...
Click to collapse
I bought from him also and am yet to fit - I got the completley wrong module :-(
Richard
What do you mean wrong module ? The "tip" of the flex cable ? Mine seems to match with what was already there ...
Hey NSD!
I purchased the exact same module for my Himalaya device, after the touchscreen being cracked.
My father, who is an electronic engineer, soldered the flat wire from the touchscreen onto the rear side of the LCD with normal copper wires. Unfortunately I have the exact same problem a you!
After attaching the entire LCD (+touchscreen) onto the mainboard, and supplying power from the battery, I'm not able to go past the Align Screen section!!!
The touchscreen is from the manufacture 'Asian Media' (I think so...).
It can't be a coincidence, that both of our touchscreens don't respond to tapping!!!
Anybody been able to get this problem fixed??
Any help would be appreciated!!!
Kind Regards,
Tony Schattat
I never replaced the touchscreen of my BA but I have replaced the screen of my ex ipaq 6315 once.
And one thing that I know is that sometimes the screen align process is different from the normal, I mean, it keeps repeating and repeating again many times....until the unit finally passes the align step and finishes the configuration. Actually I´ve "aligned" the screen more than 30 x (when I replaced the screen).
It happened just once and then I had a completely normal unit.

Display problem - who can help

Hello everybody,
-3 weeks ago a had the first problem with my display: it was gone and when i tried to reset the screen was almost un-alignable. only after a lot of resets it worked again!
-now since yesterday my screen stopped working. All the other functions work like phone etc., but I only see the backlight of the screen and nothing else. I tried to reset, hard-reset and took the whole artemis apart. Only saw a little black spot on the displayconnector (can it overheat?!)
When trying to reset for a hundred times it worked three times! I was able to do a hard-reset with screen, but that's it.
-Another thing I notice is that when I try to charge my artemis it takes longer then normal for the orange charging-light to light-up. Also after 10-15 seconds it starts to blink in stead of constant-lighting-up.
I'm running Artemis touch 4.02 with battery status on 201 mhz (was running 247 mhz until hard reset yesterday). Radiorom: 3.21.90. Accesoires: sandisk 8gb sdhc.
Who can help??? Will fitting a new display do the job?
What a coincidence, my screen also stopped functioning yesterday for several hours and I was forced to use mouse mode, until it just started working again but needed to be aligned several times over 20mins of use.
Today, same problem. It comes and goes, needs constant realigning...
I'll be doing some surgery again when I get home tomorrow, dunno about black spots yet.
I've just replaced the digitizer on it and I suspect a contact has come loose on the back of the LCD (I hope!).
Anybody else have any ideas?
so you think it's a problem of the display, rather then the main board or something like that? because I don't get a view on the display at all, only backlight.
I'm doubting on buying a new screen for about 40 US dollar. Would be sore if that didn't solve the problem.
p.s. took the artemis apart again yesterday: saw a minor damage on the display's connector. If that can cause all this, then a new screen would be the solution I think. But how does the connector get damaged???
FIXED
bought new screen. problem fixed.
Did you buy just the digitizer or the whole screen?
I think by buying the cheapest digitizer I could find is where I went wrong, looks like I'm shopping for another one...

[Q] Time to say goodbye to BA ?

Hi all,
my BA and me spent 5 nice years together, during that period I have changed 3 screens and had no other problems but recently BA suprised me (just few months after the last screen replacement) with weird problem.
Screen work, digitizer work but funny, it usually miss the place where I touch the screen 5 around 5 mm to the right, then I draw a note for eg and moving right line I draw lags after the stylus, after I start to draw to the left everything is fine. Up and down is fine too. If I align everything is fine for a some time but when I try it later its messed up again.
I tought that its software problem but after the hard reset nothing changed.
Is this problem familiar to anyone? Is it a time to change a screen again?
I dont believe that its worth, BA is rather old phone but I have previous screen with good digitizer and if you say that I should try to change a digitizer I ll try it (any manual for that? I saw just 4 contacts but covered with plastic and digitizer seems to be glued to the screen)...
Any ideas before I burry my beloved BA
thanks, best regards to BA community and special greetz to Chef Tony
ps
used to try to disassemble it, checked the cables - everything is fine (as long as I can see), they are connected nicely, beside that phone work fine, only problem is with the digitizer
Hello...friend, i got the same problem wit my Himalaya last time n guess what it works fine again after i put a small piece of paper between the phone n the battery..but unfortunately the charging port broken..
but i still have Blue Angel wit me wit no GSM problem..

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 not working after screen replacement

Hi guys
I wanted to ressurect my old moto g5 (cedric xt1676) which i was not using for a longer time. Screen was cracked but touch worked just fine. I bought screen replacement assembly and connected it. Screen (picture) is working fine but touch is not working at all. Is there any way to solve this problem? What i found untill now is that after some update motorola/lenovo disabled support for 3rd party screens - one i bought is stated to be "original" but i doubt it.
I did a factory reset before removing old screen, after connecting new one, start menu was in russian (i can't read bukvas so its a guess ), after another reset it is back to english but touch is still not working. There is a padlock symbol in top left corner of the screen.
I just wanted to fix the old phone to give it to the family member but now i spent so much time on this issue that i want to fix it very badly.
Hope that someone can and want to help me.
At the end of the day it's all down to if the correct parts were used and if it was fixed correctly. Nothing we can really help with here.
It's Russian ransomware screen
Seriously always use OEM parts.
Make sure all connectors are intact; remove and inspect contacts. Make sure you didn't miss a ground or data connection; sometimes they are just contact points between assemblies. Using the wrong length screw may cause a missing contact pathway. Assemble exactly the way it was.
The mobo may have been damaged when the display was broken. High G impacts can internally damage chipsets and crack solder joints. Flexing a multilayered mobo can break internal traces.
Sorry to hear that. Anyway - i have nothing to loose so i would try with olderversion of android - is it possible to instal without working touch in the phone?

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