[Q] nexus 7 broken screen question - Nexus 7 Q&A, Help & Troubleshooting

So here goes. The glass on the top corner of my nexus 7 has cracked, rendering the top 5mm of the touchscreen inoperable. Luckily i am in a position where i have the resources to manufacture a custom housing for the hardware with a larger screen and touchscreen. My question is, does anyone have a pinout for the screen cable to allow me to make a cable to plug a different screen onto the mobo or is this not possible. Any answers are much appreciated. Cheers, andy

Related

Dent in touchscreen

I just dropped the remote of the tv on my X7500 and now there is a small dent in the touchscreen. The LCD is not damaged. Does anybody know whether there is a fix for this, eg can the touchscreen only be replaced, or is it part of a total module with the LCD panel?
Doodle said:
I just dropped the remote of the tv on my X7500 and now there is a small dent in the touchscreen. The LCD is not damaged. Does anybody know whether there is a fix for this, eg can the touchscreen only be replaced, or is it part of a total module with the LCD panel?
Click to expand...
Click to collapse
As far as I know it is possible to detach the touchscreen from the main LCD.
The touchscreen is a thin film surrounded by a metal frame which clips over the edges of the LCD (like the top part of a board-game box!). It is fiddly to remove without the right tools and is furthermore connected by a small ribbon connector.
It may or may not be cost-effective to buy the touch screen - I have a big scratch in mine and would like a new screen, along with some other bits but I don't know where to source components.

HTC Raider/Vivid/Velocity Digitizer

Hi guys - got a question re: potentially restoring full function to a glitchy digitizer panel I bought as a replacement for my original (broken) one. I know this isn't a Q&A forum but anyone in here is likely going to have more knowledge of the digitizer from a hardware aspect than anyone in the general Q&A forums..I hope.
I had no trouble installing the panel, physically - the design was identical to the original and I took care when shaping the ribbon cable so as not to damage it. My problem is this: My digitizer seems to "skip" one contact point on both the x and y axis so that there is a dead area on my panel which makes text input quite a hassle. I can get it to read input from the area if I touch VERY gently and very accurately, but other than that it takes input from the sensors around the actual point I'm touching, like its getting more capacitive feedback from those areas than from where I'm actually touching.
I hope thats not too confusing. Basically there's a nonresponsive vertical line down the right side of my screen 1" from the edge, and another one 1" up from the bottom going horizontally. At the point where these lines intersect I have a hell of a time getting it to recognize where I'm touching accurately. I've tried the HTC screen calibration tool to no avail.
I'm wondering if anyone has any tricks I can try to get this sucker working properly.. Its slowly driving me crazy. I saw one guy on youtube take a much larger digitizer from another device and take a lighter to the glass side for a few seconds, then apply pressure to the heated areas on both sides of the glass, sandwiching it together and (I assume) reattaching or more firmly attaching the plastic film to the inside of the glass. I don't want to try this without first asking if its wise here, and see what more experienced people have to say on the subject. I may be way off here and there's a simple fix, I just haven't been able to find one.
Help!? LOL..*someone* in here must have some experience with this, no??
Thanks in advance for any replies. Helpful or otherwise.

[Q] Touch screen and capacitive buttons not working!

Hi guys,
What could be the possible reasons for a touchscreen and the capacitive buttons to stop working?
I purchased my Huawei U8800 only very recently but it was purchased 2nd hand. The phone came pre-installed with a custom rom, which is this one here: http://forum.xda-developers.com/showthread.php?t=1481168
I've had very minimal use of it ever since I received it, due to the reason that I have exams as I'm an UNI student. Therefore, I haven't modified the phone in any way, i.e I have not overclocked it or flashed a different kernel or recovery etc. The only thing I've done is installed GO SMS PRO and used it for txting and calling, that's it.
At first, everything seems to work fine. But on my 2nd day of use, the touchscreen started acting weird, where the right hand side of the screen stops working for no reason, as well as the 2 capacitive buttons on the right half of the screen (HOME and SEARCH). Then after a while, the BACK capacitive button on the left half of the screen stopped working, and eventually all 4 capacitive buttons and the entire screen stopped working.
The phone still turns on, but the entire screen doesn't pick up any finger input and there isn't any haptic feedback or vibration from the capacitive buttons. When I boot into the recovery, this is also the same.
So I contacted the seller about this, and he advised me to flash the Cyanogenmod 7.2 rom to see if this fixes the problem. It didn't, the touchscreen still doesn't work.
I'm wondering if this is related to the digitizer, which is the part of the phone that sense your finger inputs? If not, what are the other parts of the phone that could relate to the capacitive buttons and touch screen?
Definately a digitizer problem. The capacitive buttons are part of the touch screen, the touch screen is extended over the bottom of the display.
You should buy a new one from eBay or similar. If you want to buy it with a frame (black part on the front), you will have to open your phone to see if the front speaker is big or small. There are two types of front speakers and they are not cross-compatible. If you just want to buy the digitizer, you will have to remove the old digitizer from it's frame and add some glue on the new one to make sure it won't stick out.
If you don't want to mess with your phone, I am sure there are paid services that will do it for you, since replacing the digitizer is fairly easy.
Blefish said:
Definately a digitizer problem. The capacitive buttons are part of the touch screen, the touch screen is extended over the bottom of the display.
You should buy a new one from eBay or similar. If you want to buy it with a frame (black part on the front), you will have to open your phone to see if the front speaker is big or small. There are two types of front speakers and they are not cross-compatible. If you just want to buy the digitizer, you will have to remove the old digitizer from it's frame and add some glue on the new one to make sure it won't stick out.
If you don't want to mess with your phone, I am sure there are paid services that will do it for you, since replacing the digitizer is fairly easy.
Click to expand...
Click to collapse
thanks for your reply mate!
Ok so I've found this one here:
http://www.ebay.com/itm/Original-To...Glass-For-Huawei-U8800-Ideos-X5-/170721993712
Since it says it's "original", I don't have to worry about the speaker problem right?
chaoscreater said:
thanks for your reply mate!
Ok so I've found this one here:
http://www.ebay.com/itm/Original-To...Glass-For-Huawei-U8800-Ideos-X5-/170721993712
Since it says it's "original", I don't have to worry about the speaker problem right?
Click to expand...
Click to collapse
They are selling the digitizer, so there will be no problems as it's only the digitizer glass and not the frame around it. The frame itself is holding the digitizer and the speaker so that's why there may be issues when buying the front cover.
If you need a disassembly tutorial, check my Mediafire (signature) -> Documents -> U8800 Basic Maintenance Manual. It's the official disassembly guide so you can be sure you are doing it right .
Blefish said:
They are selling the digitizer, so there will be no problems as it's only the digitizer glass and not the frame around it. The frame itself is holding the digitizer and the speaker so that's why there may be issues when buying the front cover.
If you need a disassembly tutorial, check my Mediafire (signature) -> Documents -> U8800 Basic Maintenance Manual. It's the official disassembly guide so you can be sure you are doing it right .
Click to expand...
Click to collapse
Wait, that doesn't have the frame around it? I thought the black part surrounding the glass is the frame? I'm confused.......
I just want something that looks exactly like shown in that Ebay listing photo, where it has that bit of the connector part that you push into the motherboard (or whatever it's called on the phone).
chaoscreater said:
Wait, that doesn't have the frame around it? I thought the black part surrounding the glass is the frame? I'm confused.......
I just want something that looks exactly like shown in that Ebay listing photo, where it has that bit of the connector part that you push into the motherboard (or whatever it's called on the phone).
Click to expand...
Click to collapse
On your listing, it does not have frame.
If it's without frame, it is simply the front glass with connector. If it is with the frame, it has the black curve too (and speaker with led).
See this:
Without frame.
With frame.
Hope it makes sense now
Blefish said:
On your listing, it does not have frame.
If it's without frame, it is simply the front glass with connector. If it is with the frame, it has the black curve too (and speaker with led).
See this:
Without frame.
With frame.
Hope it makes sense now
Click to expand...
Click to collapse
Ahh ic ic.....so would I need to use glue to stick the digitizer glass onto the frame?
chaoscreater said:
Ahh ic ic.....so would I need to use glue to stick the digitizer glass onto the frame?
Click to expand...
Click to collapse
Yeah, but not much. Maybe you don't need to add any glue at all, the old one might hold it too.
u8800-51 touch screen bottom not responding
Blefish said:
On your listing, it does not have frame.
If it's without frame, it is simply the front glass with connector. If it is with the frame, it has the black curve too (and speaker with led).
See this:
Without frame.
With frame.
Hope it makes sense now
Click to expand...
Click to collapse
hi blefish
just posted a similar question:
http://forum.xda-developers.com/showthread.php?p=39201328#post39201328
is it the same solution? (the 4 buttons at the bottom do not work as well as the lower half of screen)
my speaker is 15 mm by 5 mm long (i looked inside). is it big or small?
all the ebay posts do not mention a frame - i will be happy not to mess with the glue
thanks
huwaei G 510
Hi guys,
I did have the same problem with a Huawei G 510. Digitizer broken and replaced, but still not working.
I have no action on screen. It lits but i can't press any button. Either the 3 buttons are working.
Checked the plug, checked some voltage in the pins.
Any other ideas ?
Thanks in advance,
Miltos Matt

Nexus 7 lcd screen issue

I all i just start to chnage my lcd cracked on my nexus 7 2012, and i have a problem the black latch on the Zif connector CN1 on the LCD came out. The latch is not brake but it's difficult to reattach, it's very small and i don't know the right position.
I have a look on youtube and google but they are not precise view of this part.
If some one can send me a picture detailled picture of this connector it would be great.
Thanks for your help
bidontdi said:
I all i just start to chnage my lcd cracked on my nexus 7 2012, and i have a problem the black latch on the Zif connector CN1 on the LCD came out. The latch is not brake but it's difficult to reattach, it's very small and i don't know the right position.
I have a look on youtube and google but they are not precise view of this part.
If some one can send me a picture detailled picture of this connector it would be great.
Thanks for your help
Click to expand...
Click to collapse
i dont get which part are you talking about. would be nice if you post an image of that.
View attachment 2400374
Hi yes it's probably better with a picture, today i succeed by replacing the black latch on the zif connector.
I replace the ribbon on the connector, and i the ribbon seems fasten when i pull on it.
I reassemble all pieces of the nexus 7, but the screen is still black.
When i connect it to the Pc, i can see the nexus 7 but nothing on the screen totally black.
I try differents thing holding power and volume + etc...
And the nexus is alwways black, i heard some sound when i put my hand on the screen so the touchscreen works.
I probably need to change the LCD ribbon ? something to check compatibility of the LCD with the Nexus 7 or this the ribbon ?
Thanks for your help
ZIF
hello i am new here and i want to ask you can i replace digitalizer zifs on nexus 7 2012 wifi please help me
You are out of luck and should have been more careful. Those connectors cannot be repaired without some serious skills and tools that you don't have.
Buy a new motherboard and be more careful next time.

Erratic touch screen after digitizer + LCD replacement

Hello,
I replaced the digitizer and LCD on my 1st generation Nexus 7 with an apparently identical Hydis LCD/digitizer assembly. Now I am experiencing erratic behavior of the touch screen, some dead spots, scrolling registering as touch, etc.
Could this be a grounding issue that happens now because I did not properly put the unit back together? If so, which areas should I focuse on / cover with electrical tape to try and get rid of the issue?
Could this also be a software issue if the lcd/digitizer model is not exactly the same? The numbers below the "Hydis" markings are the same as on the original unit, but the numbers below the code bars are different. If so, is there a solution? Drivers? Calibration?
Thanks in advance for any insight.
daviddema said:
Hello,
I replaced the digitizer and LCD on my 1st generation Nexus 7 with an apparently identical Hydis LCD/digitizer assembly. Now I am experiencing erratic behavior of the touch screen, some dead spots, scrolling registering as touch, etc.
Could this be a grounding issue that happens now because I did not properly put the unit back together? If so, which areas should I focuse on / cover with electrical tape to try and get rid of the issue?
Could this also be a software issue if the lcd/digitizer model is not exactly the same? The numbers below the "Hydis" markings are the same as on the original unit, but the numbers below the code bars are different. If so, is there a solution? Drivers? Calibration?
Thanks in advance for any insight.
Click to expand...
Click to collapse
Turns out I had not fully reinserted the digitizer ribbon connector into the mobo clip connectors. The white lines on the ribbon connector should be exactly flush and parallel with the black part of the clip connectors, and you should hear/feel a light click when they get fully inserted. Works fine now!

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