N7 (2013) screen flicker (video included) - Nexus 7 Q&A, Help & Troubleshooting

My Nexus 7 (2013) screen flickers usually after it's been on for about 20-30 minutes. At first, it will just flicker once every few seconds, but eventually, it becomes completely unusable. A few months ago, I did a factory reset, and it seemed to go away for a while, which confused me, because I don't really think it's a software issue. However, now the flicker is back with a vengeance, and I'm looking for suggestions as to what might cause this. I'm not afraid to open it up, but I'm not sure what to look for - anyone?
Here's what the issue looks like: https://youtu.be/MU6HhHgiOnU

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[Q] Nexus 10 wake-up lag

Got the N10 a few days ago and I noticed immediately a severe 5-7 sec wake-up lag. The delay is so long that instinctively, I always press the power button twice, believing the unit is powered down (the Xoom I owned before would wake-up almost instantaneously).
This problem is/was always present, even with the unit completely stock.
Other owners experiencing the same problem? What's your average wake-up delay?
Thanks,
---Mirco.
I usually have about a 1-2 second lag upon waking. It's a little annoying sometimes, but not too terrible considering how much I love the tablet.
Sent from my SPH-L710 using xda app-developers app
I haven't noticed this issue at all with my unit.
I notice about 1-2 sec delay sometimes when waking my tablet.
I posted a video on YouTube that exemplifies the problem:
youtube . com / watch?v=sbjCi8K6kyY (the forum won't let me post links: remove the spaces to watch)
As you can see, from the moment I press the power button (sec. 5) and the moment the tablet wakes up (sec. 11) there's a full 6 seconds delay.
I've seen it on mine... It seems like the screen always ends up rotating when I see the lag.
Sent from my Nexus 10 using Tapatalk HD
Mircolino said:
Got the N10 a few days ago and I noticed immediately a severe 5-7 sec wake-up lag. The delay is so long that instinctively, I always press the power button twice, believing the unit is powered down (the Xoom I owned before would wake-up almost instantaneously).
This problem is/was always present, even with the unit completely stock.
Other owners experiencing the same problem? What's your average wake-up delay?
Thanks,
---Mirco.
Click to expand...
Click to collapse
+1.. I have this lag as well.. Wonder what is causing this!
roshanpius said:
+1.. I have this lag as well.. Wonder what is causing this!
Click to expand...
Click to collapse
Haven't figure it out yet: it started doing it right out of the box so I doubt it's some sort of software/configuration problem.
All I know is that it's driving me crazy and I'm ready to return the unit.
Mircolino said:
Haven't figure it out yet: it started doing it right out of the box so I doubt it's some sort of software/configuration problem.
All I know is that it's driving me crazy and I'm ready to return the unit.
Click to expand...
Click to collapse
Tried it on my unit and it's doing the same thing! But it's random, sometimes I have a 1-2 sec delay and sometimes 5-6 sec. Very strange...
drcujo said:
I haven't noticed this issue at all with my unit.
Click to expand...
Click to collapse
This.
Best advice I can give is reflash the stock image from Google, instructions are available on here or on the android side itself, along with the image.
stiggy2012 said:
This.
Best advice I can give is reflash the stock image from Google, instructions are available on here or on the android side itself, along with the image.
Click to expand...
Click to collapse
Did that, several times. Completely stock, bootloader locked/unlocked, rooted or not, it makes no difference: the 5-6 seconds wake-up delay is always there.
One thing I noticed: it disappear when the tablet is connected to my PC via USB cable. In this case wake-up time is the normal 1-2 secs.
I've just noticed the same issue. Mine can work fine for a few unlocks and then it will flash the unlock screen for a split second and go black. After reading the other posts on here, I left it for a while and 25 seconds later (tested three times now), the unlock screen appeared properly, enabling me to enter my pin and use the device. If I didn't enter the pin, after a couple of seconds of inactivity, the screen would power off as per the normal 30 timeout for pin entry.
If this is another hardware fault, I think I'll have a little cry First my Nexus One had digitiser issues, then power button problems (both times replaced/repaired under warranty). The Galaxy Nexus had 5GHz wifi issues and the Nexus 7 had bezel lifting issues...
**UPDATE**
As soon as I posted this, I remembered I'd recently installed LightFLow to get my notifiction lights for emails like my GNex has with CM10. I uninstalled it and tried again. After 30 power off/on cycles I haven't had one instance of it having the unlock delay...Seems connected in my opinion (in my case anyway).
I see nobody else here remembers having to wait for radio's or tv's to "warm up" before using them 1-2 seconds? HAHA, yeah, terrible lol I'm not talking just the 30's to the 60's here, I mean the 70's and 80's, I'm 41 Maybe those of us my age and older appreciate the tech now the most, because we've seen it progress so much from where it was.

Nexus 7 screen glitching few seconds after booted in.

My screen glitches (think of TV static, but striped and colored similar to the background image) about 5 seconds after booting into android (after the nexus logo loads.
The tablet is fully functional doing the 5 seconds. After that, the screen glitches like above, and I can hear a faint sound from the nexus 7 that grows in pitch until it bursts and the device shuts down. Then, it tried to boot again and this process is repeated.
I don't know what caused this - I haven't used my nexus 7 for few weeks or so, and the last time I used it it was working.
The bootloader is unlocked but it is running stock 4.2.
I have tried booting into recovery mode and wiping data, but that doesn't fix anything.
Anyone know how to fix the issue?

Why is my Nexus 7 freezing on boot?

My Nexus 7 is freezing a few seconds after it boots up. I goes to a black screen with some visual artifacts. The memory on my Nexus 7 is full but I don't think that's the issue. It took a three foot fall from my bed stand to the rug and now it's doing this. Is there anyway to fix it?
I took a video of it booting up but I cannot post external links because I am a new user. Do a search for "Nexus 7 Boot freeze 0T99" on youtube and it should be the first video.
So now I hard resetted my Nexus 7 and deleted everything off it. The screen glitches out after a couple of minutes. Any ideas?

Constant Freezing/Rebooting Nexus 7 (2012)

Ok guys. I don't post often since I can usually find my answers by lurking the forums....but I'm at my wits end here. My 2012 Wi-Fi nexus 7 all of a sudden started acting funny one day. It would freeze u randomly, then reboot, then get stuck in a boot loop for about 10-15 minutes, then boot up, then freeze after about 1-2 minutes of use and repeat the whole process. This was on stock 4.4.2. I've since tried using the toolkit to reflash stock, fix bootloop, unlock and root...all of which I was able to do. None of which helped my issue. Although flashing AOKP DID seem to fix it for about an hour.
Anyway, I gave up on it for about a week and came back to it this morning. Although it wasn't even going to te google boot animation, just stuck on the google logo. So I reflashed stock 4.4.2 again. Now I'm back to square 1. So it boots and will function for maybe about a minute or 2 (or less) before freezing and rebooting.
Is this device shot? I'm out of Google AND ASUS warranty now
I posted something in the big help thread yesterday (probably a mistake). Mine is doing exactly what you describe in terms of working for about 2 minutes before freezing, then rebooting. Mine is 100% stock 4.4.2. Never rooted, unlocked, etc. I have the adb stuff, but I haven't even attempted anything, because it seems so unstable. I don't want a partial flash to screw it up even worse. I feel slightly better knowing that someone else is dealing with exactly the same thing in a similar time frame, so maybe it is a software thing, not a totally dead unit.
Well I may have made some progress. Since the warrenty is up anyway, I decided to crack it open. I noticed the GPU was getting extremely hot for just sitting at the home screen. So I enabled developer options and turned on some monitoring options (the fact that it stayed on long enough to do this is a miracle in itself).
Right now I have some overlay monitoring on including cpu usage and gpu rendering (on screen as lines). I also checked the "stay awake" while charging option. It's been on about 2 minutes so far, although graphics performance is horrible atm. Almost like project butter is disabled and it's running at half power....that could just be the monitoring overlay though. We'll see what happens...
*Update*
It made it 21 minutes, but it did reboot again. On restart, the OS smoothness is back to normal, and it does seem like it goes longer stretches without restarting now, however the issue is obviously still there. I should add that the back cover is currently off. which is starting to make me think this has to do with cooling
9629464420
Okay....I just admitted defeat with this issue. Just ordered a replacement board for $30 because the resets are still happening. Upon reset, I can actually hear a part of the main board buzzing for about 5 seconds (not the speakers). Not to mention that prior to this issue, I was having a lot of wifi connectivity issues anyway. Hopefully the board arrives before my long bus ride to new york...

Freezing and Crashing after Random Periods of Time

So I've looked at all the other threads on this topic already, and most of them were CM14.1 or CM14 issues... I'm running RR (as can be seen in my signature) on 3 of my S5's. 2 of them have been fine for almost a year with it. One of them isn't so happy
You turn it on... don't do hardly anything (i literally use it as a phone, imagine that?!?), no overclock/underclock or any root tools... just my standard MoodSMS app and the other standard minimal GAPPS
Could be 1 minute, could be 15 minutes, could be 3 hours, could be instant. I turn the device on, it works fine... Once I turn the screen off or it goes into sleep mode due to screen on time out, it never turns back on without battery pull. Also, sometimes it just randomly reboots and gets CRAZY hot
I'm chalking this up as a hardware issue, but I still wanted to ask others about it to see if maybe I'm just being stupid about something. This also is a Release Day Galaxy S5... so it is over 3 years old
Any experience with this kind of issue? if so, what did you do to try to fix it, or did you just get a new phone (i did personally, but I want to go back to my S5. Got a Nexus 6 and a 5C... ones too big, the others too small. S5 is perfect)
Post some logcats and dmsg logs?

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