Database Users

Screen lagging, colors off, static screen..... Android L HELP!!!

So first off, i know that Android L is a developer preview and would have some issues here or there. some apps would crash and what not, I got that. i have had L on my Nexus 7 since day 2 with minimal problems at all. Last night at work i turned my tab on to find a static screen and nothing worked. i could hear it unlocking, but it was just static. after about an hour trying to get some of the screen, it came too but with all the colors off and running extremely slow. When I say slow, I mean i would press an app and it would take anywhere from 3-9 minutes to pop up if at all. I can't get it to go into the bootloader to get back to 4.4.3 or anything. As of right now, this Nexus is rendered useless to me and I HATE THAT!!!! if anyone has any insight for me i would appreciate it. Thanks

savini72 said:
So first off, i know that Android L is a developer preview and would have some issues here or there. some apps would crash and what not, I got that. i have had L on my Nexus 7 since day 2 with minimal problems at all. Last night at work i turned my tab on to find a static screen and nothing worked. i could hear it unlocking, but it was just static. after about an hour trying to get some of the screen, it came too but with all the colors off and running extremely slow. When I say slow, I mean i would press an app and it would take anywhere from 3-9 minutes to pop up if at all. I can't get it to go into the bootloader to get back to 4.4.3 or anything. As of right now, this Nexus is rendered useless to me and I HATE THAT!!!! if anyone has any insight for me i would appreciate it. Thanks
Click to expand...
Click to collapse
That is a loose ribbon cable that causes the static screen. You can remove the rear cover, using a fingernail, & disconnect the battery, press the ribbon cable into place, & then reconnect & reboot. You can check out the dismantling guide, or the "Possible touch screen fix" thread". No seals are broken & it is fairly simple to do. But that is how you know it is HW, not SW related. If it were SW, bootloader or recovery would work. I had this same issue along with touch screen issues, months ago & that's how I fixed both issues.

Oh awesome, I'll try that out when I get back home. Thanks for the quick response

GSLEON3 said:
That is a loose ribbon cable that causes the static screen. You can remove the rear cover, using a fingernail, & disconnect the battery, press the ribbon cable into place, & then reconnect & reboot. You can check out the dismantling guide, or the "Possible touch screen fix" thread". No seals are broken & it is fairly simple to do. But that is how you know it is HW, not SW related. If it were SW, bootloader or recovery would work. I had this same issue along with touch screen issues, months ago & that's how I fixed both issues.
Click to expand...
Click to collapse
you, my friend, just saved me from throwing my nexus through a window! it turned out that the gold ribbon cable, laying over the batter, came undone somehow. but it is now fixed and i can stick on L for a bit longer! THANKS AGAIN!

N7 screen issue + not recognized by PC

So I have an issue with a 2012 N7, warranty is long gone. I've tried all suggestions from billykxda's thread, but no luck thus far. I've also tried Google's official page on the topic as well.
I've left the device charging for many consecutive hours, both via AC power and USB, and I suspect my issue resides with the LCD screen. Also tried a hard battery pull. It's also important to note that I haven't undertaken any mods on the device at all, i.e. the bootloader is still locked and USB debugging is not enabled yet.
When I plug the device into my PC the Win7 driver notification bubble pops up, usually reporting either an Unknown Device or an "APX drivers not installed" message. I'm unable to get it to boot into Fastboot, Recovery, or Android OS. Plugging/unplugging the device via USB yields these driver messages over and over again, along with the Win7 sound notification, so the device isn't totally dead, but no amount of button combinations or 30-60+ second button holds are getting any response.
Has anyone else experienced these issues before? Do you think my device is totally dead?

AvidPhisherman said:
Has anyone else experienced these issues before?
Click to expand...
Click to collapse
Yes; I am also experiencing similar issues. Unfortunately, I have not reached a solution. I just replaced a broken screen for a friend. Once I got the screen in, I tried turning it on but didn't see anything happen. I began to research and thought I had the dead battery issue that most people get when leaving it unplugged for an extended period of time. I plugged it in using the wall adapter for a few hours, used the power+volume buttons and still didn't get any response. Finally, I decided to charge it with my PC. The PC recognized something was plugged in, installed drivers, and now I have a Nexus 7 in my connected devices list. While connected to my PC, I hold power+volume down and hear the USB disconnect, reconnect, and have an unrecognizable device attached. This leads me to believe that the Nexus 7 is working properly and the screen is not working. I have taken the entire device apart to re-seat all connections 3 different times and still cannot get it to work. I hope someone can shed some light on our issues!
Edit: I forgot to mention, I also tested the battery with a digital multimeter. It reads approximately 3.79 volts DC. I thought it may be important to state this in case the issue is battery related. I'm not certain what the correct value should be for it to work properly.

I am currently trying to diagnose this problem. Yesterday, I hopped on Craigslist and bought a working Nexus 7 for 50$. I am currently taking it apart to rob parts from it and figure out where the problem is. So far I have tested the battery. The battery reads approximately 3.78 volts DC so I can probably rule this out as my problem.
Also, I noticed something strange yesterday. I took the broken Nexus with me when I went to meet up with the man selling the used/working Nexus. While I was outside in very bright sunlight, I pushed the power button on the broken Nexus. I noticed that I could actually see the screen doing something. It was all fuzzy and had lines running every where, but you could in fact see it doing something. I think the replacement screen I received is bad, but I won't know until I start swapping parts.
AvidPhisherman, for now maybe try taking your Nexus out in very bright sunlight and see if you can see the screen do anything when you press the power button. Also, I'm not trying to hijack the thread. It seems that we have very similar issues. I hope to find something that fixes both of our problems.

Success.... kinda. I tried combining the broken Nexus 7 motherboard with the working Nexus 7 screen but it wouldn't fit since one is the 3G model, and the other is the Wifi only model. Next, I put everything back together on the broken N7, but this time I used the LCD ribbon cable from the good N7. Success!!! It powered up, and I can see the screen. My problem now, is that the screen is mostly unresponsive and acts like you are touching it in random spots, when you're not touching it at all. I'm taking it apart to re-seat the connections... again.

__redfox__ said:
Success.... kinda. I tried combining the broken Nexus 7 motherboard with the working Nexus 7 screen but it wouldn't fit since one is the 3G model, and the other is the Wifi only model. Next, I put everything back together on the broken N7, but this time I used the LCD ribbon cable from the good N7. Success!!! It powered up, and I can see the screen. My problem now, is that the screen is mostly unresponsive and acts like you are touching it in random spots, when you're not touching it at all. I'm taking it apart to re-seat the connections... again.
Click to expand...
Click to collapse
Hey redfox thanks for taking in interest in this! You're not hijacking the thread, your posts are very helpful. Good to know I'm not the only one experiencing these issues.
I'm just a hobbyist with an interest in fixing things, although I don't have much experience with DIY fixing. I didn't have a chance to try turning the screen on under direct sunlight, but yesterday I took both my non-working Nexus 7s (the first one I mentioned in my OP, the second one just has a bad/hollowed out USB port) in to a repair shop for a free diagnosis. I'm actually a business user, my company owns the tablets but I'm responsible for maintenance/tech troubleshooting.
Please keep me posted with updates as to how your progress is going. I'll post again once I get a report from the repair shop re: my issues.

Hi,
I have been having the same problem,
I bought my wife a used Nexus 7 and it worked just fine for almost a year then all of the sudden the screen would not function
there would be lines going through it but it remain dark.
thank you for researching the matter i will try to buy the part online and see if i can get it to work now!
if i understand it correctly there is no need for a new mother board but just a new LCD ribbon cable?

godnessy said:
Hi,
I have been having the same problem,
I bought my wife a used Nexus 7 and it worked just fine for almost a year then all of the sudden the screen would not function
there would be lines going through it but it remain dark.
thank you for researching the matter i will try to buy the part online and see if i can get it to work now!
if i understand it correctly there is no need for a new mother board but just a new LCD ribbon cable?
Click to expand...
Click to collapse
I cannot guarantee that it will fix your screen, but it is possible. When I had this one out in the sun, it did the same thing. The screen was super dark, and I could see crazy lines. Hopefully a new ribbon/cable will fix your problem. They are only a few dollars on Amazon.com

godnessy said:
Hi,
I have been having the same problem,
I bought my wife a used Nexus 7 and it worked just fine for almost a year then all of the sudden the screen would not function
there would be lines going through it but it remain dark.
thank you for researching the matter i will try to buy the part online and see if i can get it to work now!
if i understand it correctly there is no need for a new mother board but just a new LCD ribbon cable?
Click to expand...
Click to collapse
__redfox__ said:
I cannot guarantee that it will fix your screen, but it is possible. When I had this one out in the sun, it did the same thing. The screen was super dark, and I could see crazy lines. Hopefully a new ribbon/cable will fix your problem. They are only a few dollars on Amazon.com
Click to expand...
Click to collapse
Hello fellow users! Quick update, I finally heard back from the repair shop.
Bad news - they tried swapping out the screen, then the battery, USB charging port, display cables, etc. etc. and nothing worked. Their diagnosis is that the tablet has a fried motherboard, and they're unable to repair and/or replace it
Good news - it cost me nothing to receive this diagnosis
Hopefully the outlook is not so grim for your respective N7s. Just wanted to post an update as to what I learned from this whole experience.

Hi guys, Reporting in.
Toke a while but i got the part AND found the stupid device!
After ALOT of fiddling, taking apart and putting back again i found out that the problem was the battery!
it looks like it was on its last leg and that caused all the strange screen stuff.
I dont have another battery to replace it so instead i hooked it up straight to a USB cable and into the socket and it works just fine
thanks for the tips and hopefully this helps someone else!

Screen going gray?

My friend has recently started having problems with his G2. The problem is that the screen goes gray (you know, like old tv's when they didnt have any signal) when waking the phone up and couple of smacks against the wall seems to fix the problem mostly. The interesting thing is that the phone works perfectly while the screen is gray, he connected it to his laptop and was able to use it with somekinda program. But this is getting really annoying because its happening more and more often. What could be the problem? Broken screen, bad connection? Any help will be appreciated.

I have also been having this issue recently with my G2. I disassembled the phone and tried re-seating the video connectors. The phone did not exhibit the behavior for the remainder of that day, which was nice... but it started doing it again the next morning. My guess is the connectors are working themselves loose over time. Anybody have a suggestion on how to make the connections a little more stable?

HD2 Wi-Fi Problem (Doesn't turn on at all)

Hello, guys.
Several days ago I bought HD2 with cracked screen, also stuck in Android bootloop (some Cyanogenmod ROM)
I don't even planned to make it work normally, planned to use it as spare parts for another HD2, but after reflash to a stock 3.14 - it booted up normally.
But Wi-Fi is dead, it simply doesn't turn on.
Link to a video:
youtu.be/4QglUj_CIvI
Anyway, I will replace display module as soon as it arrive to me.
So, does anyone have suggestions? Something tells me, it's a HW problem, not SW. Now device is dissasembled.
And there is no visible damage near Broadcom chip or somewhere else. No corrosion, no cracks, no overheating marks. Nothing.
Bluetooth is working normally, despite it's the same IC.
Any help is appreciated...

nearnull said:
Hello, guys.
Several days ago I bought HD2 with cracked screen, also stuck in Android bootloop (some Cyanogenmod ROM)
I don't even planned to make it work normally, planned to use it as spare parts for another HD2, but after reflash to a stock 3.14 - it booted up normally.
But Wi-Fi is dead, it simply doesn't turn on.
Link to a video:
youtu.be/4QglUj_CIvI
Anyway, I will replace display module as soon as it arrive to me.
So, does anyone have suggestions? Something tells me, it's a HW problem, not SW. Now device is dissasembled.
And there is no visible damage near Broadcom chip or somewhere else. No corrosion, no cracks, no overheating marks. Nothing.
Bluetooth is working normally, despite it's the same IC.
Any help is appreciated...
Click to expand...
Click to collapse
could be something regarding to your wifi antenna in your housing, the connector to it, or coaxial cable to the mainboard

i9505 - can't turn it on anymore & not detected by pc

Hi
I've got i9505 device. It isn't turning on anymore. This phone worked okey, but it fell many times. Display is quite shattered. But it stopped working not directly by a fall. What is strange plugging it to PC results with lack of detecion. Charging diode is not lit. I bought a new battery, but it didn't help. Any ideas? The phone was never modded in any way. It is on stock firmware

Sounds like some component inside has failed after being dropped many times.

quite obvious ;p
i thought about some software issue maybe?
also i thought about power button or usb port issue - i once changed this port like half a year ago, cause it was broken