Hi,
So my missus dropped her tablet (again) and this time she managed to smash the digitzer. So I went to replace it along with a new screen...
6 months later I get around to changing the parts. I reassemble and try to fire it up.
The Google logo flashes up and stay for about 2-3 sec and the disappears. Then nothing happens.
I tried plugging it in for 10 hrs and retried. No luck.
I can boot into the boot loader and the buttons work.
When I "power off" the device, suprise, it shuts down, on power up the logo flashes again and nothing.
Next I try "start" logo flash and nothing
When I tried Recovery the same again, then after about 60 sec it flashed the funny colored Nexus logo (very quick flash) then nothing again
When I select "Reboot Bootloader" it restarts the boot loader.
I'v been crawling the internet for hours now and have only found repeated attempts of loading the bootloader and trying recovery mode.
I did connect the tablet to the pc for a minute and could see a file structure but haven't been able to do that again.
Can someone please help.
Thanks
Matt
I'm beginning to think that the memory with the os has been lost, I might try unlocking the boatloader and refreshing the oem Rom. Any thoughts?
Sent from my LT22i using Tapatalk
So I unlocked the bootloader and flashed the newest stock rom to the tablet and still wont boot.
Same as before, Google flashes up and then black screen.
So, I figured it out. It was working the whole time, only the backlight went off after the Google logo disappeared. Its not the brightness sensor as its reading correctly in GPS status. It seams to be a software issue.
I've set the brightness to a fixed level and it is working OK, when I set it back to auto adjust it turns the backlight off again, when I shine a torch on the sensor I goes bright again.
Sent from my Nexus 7 using Tapatalk
matthewobrn said:
So, I figured it out. It was working the whole time, only the backlight went off after the Google logo disappeared. Its not the brightness sensor as its reading correctly in GPS status. It seams to be a software issue.
I've set the brightness to a fixed level and it is working OK, when I set it back to auto adjust it turns the backlight off again, when I shine a torch on the sensor I goes bright again.
Sent from my Nexus 7 using Tapatalk
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I am having the same problem as you have described above. After changing the digitizer/ lcd, the tablet boots up and google logo shows up for few seconds and the screen goes blank. It goes into recovery fine. How did you fix it?
Turns out it's the lux sensor. Turn it on wait for the Google logo to disappear and grab a bright torch and hold it over the lux sensor it's right beside the camera the screen should go bright once it gets to the lock screen. If not use the torch to see what's on the display and once you've unlocked the tablet set the brightness to constantly on full instead of automatic brightness and this will override the lux sensor.
Sent from my Nexus 7 using Tapatalk
matthewobrn said:
Turns out it's the lux sensor. Turn it on wait for the Google logo to disappear and grab a bright torch and hold it over the lux sensor it's right beside the camera the screen should go bright once it gets to the lock screen. If not use the torch to see what's on the display and once you've unlocked the tablet set the brightness to constantly on full instead of automatic brightness and this will override the lux sensor.
Sent from my Nexus 7 using Tapatalk
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Thank you so much. I followed your suggestions and now Nexus 7 is back up and running.
But I am afraid of rebooting it because I wasn't able to replicate your instructions once I had to reboot for system update. I had to flash factory image through fastboot and had to redo the initial setup and then the screen turned on welcome screen. So, it is hit and miss. Sometimes screen does turn on after few minutes of booting and sometimes it takes several hours for the screen to turn on.
I have my screen brightness setup to full. Will this override the lux sensor permanently or only until the next reboot? What is your experience with the tablet since you discovered this solution? Again, thank you so much for your help. I almost gave up on it and was ready to trash it.
Setting it to full with auto off should kick in after boot. When mine boots up it doesn't show the swirling dots but once it's done loading it pops up with the lock screen. I read somewhere that YouTube overrides the brightness setting and defaults back to using the lux sensor. I downloaded and paid for lux auto brightness that can override all app brightness settings permanently and it worked a charm for me. Maybe give to lite version a go and see how you get on.
Sent from my Nexus 7 using Tapatalk
matthewobrn said:
Setting it to full with auto off should kick in after boot. When mine boots up it doesn't show the swirling dots but once it's done loading it pops up with the lock screen. I read somewhere that YouTube overrides the brightness setting and defaults back to using the lux sensor. I downloaded and paid for lux auto brightness that can override all app brightness settings permanently and it worked a charm for me. Maybe give to lite version a go and see how you get on.
Sent from my Nexus 7 using Tapatalk
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Thanks, just downloaded Lux Auto Brightness. Will see how it goes.
Related
have android desire build on my hd2 and it works great...if i put my phone in standby for a few seconds it comes back on just fine but if its in standby for a few minutes only the keys light up and i have to pull the battery..i was reading some posts and thought i saw something about deleting the data.img....was wondering if this was the solution to the problem or something else..
If you have a black screen and the button lights are on, you can stick it under a bright light and turn it on. It should come on after that. If that's the case then turn off automatic brightness and see if that corrects the issue.
auto brightness wasnt on when i went to go change it...i flipped to it just to see if it would do it but it does the same thing..if in standby for too long,the buttons light up and the screen lights up black but thats it.
dbrodrive912 said:
auto brightness wasnt on when i went to go change it...i flipped to it just to see if it would do it but it does the same thing..if in standby for too long,the buttons light up and the screen lights up black but thats it.
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hmmm..... have you tried deleting your Android folder and installing another build?
Iam having the exact same problem.
Screen stays Black. Lightens up but nothing comes on...sometimes its fine.
but sometimes it just stays black untill i pull out the battery
Hey Guys,
I have figured out how to get rid of the ugly green screen issues with 3rd party kernels for MIUI.
Goto Settings
Display Settings
Turn automatic brightness on
Adjust the slider until the screen is at the lowest (before it turns green)
Go into advanced mode
Turn on Use Custom under Light levels
Light level to dim - set to 10
This should fix all the issues with green screens!
I never had any green screen on miui, with official or neo/vorbeth/glitch kernels.
I was curious and tried what you posted above, and I can't do step 4
3. Turn automatic brightness on
4. Adjust the slider until the screen is at the lowest (before it turns green)
If auto brightness is set to "on", I can't slide..
filou75 said:
I never had any green screen on miui, with official or neo/vorbeth/glitch kernels.
I was curious and tried what you posted above, and I can't do step 4
3. Turn automatic brightness on
4. Adjust the slider until the screen is at the lowest (before it turns green)
If auto brightness is set to "on", I can't slide..
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Click to collapse
That's odd, maybe the new versions fixed this problem. I guess coming over from cm7 if you have custom brightness it will turn to green with miui
Sent from my Xoom using Tapatalk
it worked, thanks! my dim level was set to 5, changing it to 10 worked perfectly.
strange... never had this issue when i was on miui and that was yesterday.
i have the same problem, i went at a local repair store, and the guys overthere told me that the colour module is broken !!! anyone knows something about this???
they say that in my case i need to replace the screen in order to fix this issue... if anybody have other idea...
thanks in advance !
phone samsung galaxy s1 gt-i9000 stock rom not rooted
Ever since as long as I can remember, my phones brightness will dim to a brightness so dark you just can't see it. Even if you manually set the brightness, once you lock and wake the screen, it's fine then suddenly switches to dark.
I've used multiple ROMs and they all do it. Is it a device issue, or could it be a kernel issue? I've not screwed with kernels so I don't know if it could be it. If it's a device issue, I'll be getting a replacement ASAP.
Any help is appreciated!
Now that I'm able to Google, I realize it's a common problem with the S4.
Sent from my SGH-I337 using Tapatalk 4
Serfma said:
Ever since as long as I can remember, my phones brightness will dim to a brightness so dark you just can't see it. Even if you manually set the brightness, once you lock and wake the screen, it's fine then suddenly switches to dark.
I've used multiple ROMs and they all do it. Is it a device issue, or could it be a kernel issue? I've not screwed with kernels so I don't know if it could be it. If it's a device issue, I'll be getting a replacement ASAP.
Any help is appreciated!
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Click to collapse
The only time I had the screen go dim like you describe is I remember once following a phone call. It goes dark when you put the handset to your ear like it's supposed to, and lights back up when I pull it away from my head. I was stepping out of a truck into the broad daylight when I tried to hang up my phone, I couldn't see the screen very well. The other party ended the call, and my screen timed out while I was squinting at it. I pushed the home button and it lit right back up nice.
You got something going on, and if you tried all those different roms, say... can you nandroid back to stock? Did you try that?
I'd try everything I could on the outside chance of repair instead of replacement. If you get a replacement you might be stuck with that MF3 where you cannot install a custom recovery.
fukenbiker said:
The only time I had the screen go dim like you describe is I remember once following a phone call. It goes dark when you put the handset to your ear like it's supposed to, and lights back up when I pull it away from my head. I was stepping out of a truck into the broad daylight when I tried to hang up my phone, I couldn't see the screen very well. The other party ended the call, and my screen timed out while I was squinting at it. I pushed the home button and it lit right back up nice.
You got something going on, and if you tried all those different roms, say... can you nandroid back to stock? Did you try that?
I'd try everything I could on the outside chance of repair instead of replacement. If you get a replacement you might be stuck with that MF3 where you cannot install a custom recovery.
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Click to collapse
Mf3? Is that something new with the S4s to prevent custom ROMs?
It does not go pitch black. It goes very dim every time I wake the device. If you Google S4 screen dimming it's a wide problem.
Once you wake it, it's fine for 2 seconds and dims quite dark. It is not screen timeout/sleep/etc since I can still see the screen.
Sent from my SGH-I337 using Tapatalk 4
I'm on MDJ and don't get any auto dimming of any sorts. Auto brightness is off, brightness controls about 1/3 brightness (indoors), but Power Saving mode is on with all three options on.
My S4 is MDL. I found out the problem (More than likely) was the Paranoid Android ROM. I was on ver. 3.69 and since switched to CM 10.2 Nightlies, latest as of today, and no screen dimming. I will install my usual apps and use it as normal and if it happens, it's probably an app. However, the only apps I use are ones such as SwiftKey, LightFlow, ASTRO, Chrome, and Dashclock.
I'm on stock MDL. It has only been occurring since I upgraded from MDB 3 days ago, and is a huge PITA because brightness controls are unresponsive during this time - I go into settings to adjust brightness since I have removed all the brightness controls from the notification panel as they've always worked just fine, and turn off auto brightness, scale it all the way to max, and it is still dim as crap.... Only fix I've seen is to reboot, which is obviously not ideal in most situations when I need to wake the device! I'm using STOCK kernel, STOCK ODEXED ROM as well, nothing crazy should be going on to screw with brightness settings being unresponsive either!
KryptosXLayer2 said:
I'm on stock MDL. It has only been occurring since I upgraded from MDB 3 days ago, and is a huge PITA because brightness controls are unresponsive during this time - I go into settings to adjust brightness since I have removed all the brightness controls from the notification panel as they've always worked just fine, and turn off auto brightness, scale it all the way to max, and it is still dim as crap.... Only fix I've seen is to reboot, which is obviously not ideal in most situations when I need to wake the device! I'm using STOCK kernel, STOCK ODEXED ROM as well, nothing crazy should be going on to screw with brightness settings being unresponsive either!
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Do you by chance use Light Flow?
I solved the problem. I had "lcd_backlight" control flipped on in the settings of Light Flow. It fixed it. To tell if it's an app problem, just factory reset and try, once you boot up, to lock and wake the device to see if it happens. If it doesn't, it's an app problem more than likely, or even a general setting. Troubleshoot for the win!
Serfma said:
Do you by chance use Light Flow?
I solved the problem. I had "lcd_backlight" control flipped on in the settings of Light Flow. It fixed it. To tell if it's an app problem, just factory reset and try, once you boot up, to lock and wake the device to see if it happens. If it doesn't, it's an app problem more than likely, or even a general setting. Troubleshoot for the win!
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Click to collapse
I do use Light Flow, but I don't have either one of the LCD Backlight controls enabled, never have and never will, so I don't know how that could be affecting my phone at all.... That's a good start for some, but not for me, unfortunately! Good catch though
Sent from my Samsung Galaxy S 4 using the XDA app
Serfma said:
Ever since as long as I can remember, my phones brightness will dim to a brightness so dark you just can't see it. Even if you manually set the brightness, once you lock and wake the screen, it's fine then suddenly switches to dark.
I've used multiple ROMs and they all do it. Is it a device issue, or could it be a kernel issue? I've not screwed with kernels so I don't know if it could be it. If it's a device issue, I'll be getting a replacement ASAP.
Any help is appreciated!
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Click to collapse
I had this issue before on my Galaxy S3. I ended up replacing the front glass because of a dead pixel. Come to find out I had a sensor issue and that was causing my brightness auto going to whatever level it wanted.
Perhaps you're experiencing that too. Haven't heard or read of any sensor issues yet with the S4 but you could be the lucky winner!
I'm having a couple issues with my nexus 4 after upgrading manually to Lollipop with the system image from Google Developers.
Sometimes, when the screen goes idle and turns off automatically or when it's turned off manually using the power button, the screen flashes on a higher brightness and shows the lockscreen before turning off. (I'm guessing the desired result is that the lockscreen should appear 'on screen' after the backlight is completely off).
What this causes is that when turning off the screen, the screen dims with the animation (fade to black and turn off), but before (and sometimes after) the animation is complete, it flashes for a few milliseconds displaying the lockscreen/background, even when locking the phone inside an app.
I could upload a video of the issue at a later time.
This bug didn't happen on any version/rom that went through my phone (many stock, many custom). Although I haven't tried installing another 5.0 ROM / AOSP.
The update also brought back a [hardware?] issue this Nexus 4 unit also has had since I got it. When dimming the screen using the brightness slider, sliding to the lowest setting turns off the backlight completely (effectively making the screen pitch black instead of dimming). This issue has been reported before and I was using Gravitybox to override the system lowest brightness level. Could these two issues be related? (Note that this issue didn't trigger this behavior before).
This issue has been reported by other users here:
http://forum.xda-developers.com/nexus-4/help/zero-brightness-t2168071
http://forum.xda-developers.com/nexus-4/help/problem-nexus-4-brightness-t2052857
https://www.youtube.com/watch?v=dvgt17sKQsU < this shows the screen going pitch black at lowest brightness, it happens either from the widget, the slider, and the option in settings.
Any ideas on why it happens or how can it be corrected?. Do you also have this issue?.
Many thanks in advance.
Hi,
I have this phone for little over 2 years. For over 1 week now I'm experiencing my phone not being able to wake up when I use the power button/home button. Whenever I push the button, the screen flashes for like 1s blue color, you can also see that the notification panel is blacked out and part of it green and it doesn't wake up. Sometimes it doesn't even flash. It used to take about 10 tries to wake it up but today I couldn't wake it up. I performed soft reset, I couldn't see the booting animation at all but it rebooted, buttons lit up and I was able to get in. It's like the phone is working fine in the background but the screen doesn't light up. I can turn down/up the volume, take a screenshot, get into settings, open apps, write a message but the screen is black. Even my alarm went off this morning but I couldn't dismiss it.
I downloaded an Always On Display app. Although I don't actually see the screensaver when it's locked, it's still on and it's easy to get in beacuse of it.
It all started with the screen flickering on minimum brightness. In February this year I had the screen replaced for the same issue but this time it's worse because of the blacked out screen.
Any ideas what it could be? Faulty display again?
Thank you
tessicorn said:
Hi,
I have this phone for little over 2 years. For over 1 week now I'm experiencing my phone not being able to wake up when I use the power button/home button. Whenever I push the button, the screen flashes for like 1s blue color, you can also see that the notification panel is blacked out and part of it green and it doesn't wake up. Sometimes it doesn't even flash. It used to take about 10 tries to wake it up but today I couldn't wake it up. I performed soft reset, I couldn't see the booting animation at all but it rebooted, buttons lit up and I was able to get in. It's like the phone is working fine in the background but the screen doesn't light up. I can turn down/up the volume, take a screenshot, get into settings, open apps, write a message but the screen is black. Even my alarm went off this morning but I couldn't dismiss it.
I downloaded an Always On Display app. Although I don't actually see the screensaver when it's locked, it's still on and it's easy to get in beacuse of it.
It all started with the screen flickering on minimum brightness. In February this year I had the screen replaced for the same issue but this time it's worse because of the blacked out screen.
Any ideas what it could be? Faulty display again?
Thank you
Click to expand...
Click to collapse
It's over to have this phone for little over 2 years now you should have to change
TIP:
Flash a new stock rom of your phone from sammobile via ODIN.
Sophia.xda said:
It's over to have this phone for little over 2 years now you should have to change
TIP:
Flash a new stock rom of your phone from sammobile via ODIN.
Click to expand...
Click to collapse
That would be great, but I'm not a person that buys new phone every 2 years. I was thinking about it though .
When it comes to flashing. Do you think that would help? I don't want to end up with a black screen unable to set the phone up again. Cause overall it's working great .
Hi, i have the same problem, i'm from Belgium, and I have blinking screen problem and wake up screen problem :s
is it a software issue (nougat???)
before the big update (marshmallow i dont have any problem)
i'm on firmware A510FXXS7CRJ6_A510FLUX7CRJ1_A510FXXU7CRJ6_HOME.tar.md5
Turn screen brightness up abit to stop the blinking of screen. It's an issue of the screen hardware itself at low brightness after wear and tear. As for the hanging issue, maybe it has to do with your AOD app? Try uninstalling the AOD app OR flashing a stock Rom OR custom rom OR factory reset and use your phone at a higher brightness that the screen does not blink and see whether it still persists.
conanDO98 said:
Turn screen brightness up abit to stop the blinking of screen. It's an issue of the screen hardware itself at low brightness after wear and tear. As for the hanging issue, maybe it has to do with your AOD app? Try uninstalling the AOD app OR flashing a stock Rom OR custom rom OR factory reset and use your phone at a higher brightness that the screen does not blink and see whether it still persists.
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Click to collapse
Thanks, because of my past experience with the same problem earlier this year I know about that "solution". Unfortunately, it makes the battery die faster as expected. Which is sad because I used it mainly on low brightness. So it's really not a solution at all.
I got rid of the AOD app because I found out that the phone lights up on 2nd try. AOD didn't work at all. I have to wake it up, put it to sleep and wake it up again which is always successful and the screen lights up. The screen flashes white about 3 times in a row now otherwise it works.
I haven't flashed it yet although I wanted to. But I will see what can I do. Thank you though!
I'm having the exact same issue using LineageOS.
It's already been 2 years, but since this thread is one of the first results on Google, I'll gladly add a solution.
Exact same problem for me, went through two screen repairs under warranty, and it would always come back a year later. No difference between Samsung OS and LineageOS, though I haven't tried rooting it.
Found on Ifixit: this issue is related to the AMOLED screen technology used by Samsung (among others). You can look it up, apparently there is a bad (?) voltage management in low brightness which worsen with time.
I could fix it with the "OLED Saver" application on Play Store. It works around this voltage management and allows you to reduce the brightness without the green flickering.
I still got white flashes after the installation, but not anymore the day after. I could even disable this application without the issue coming back.
I don't know what kind of magic cleanup this app performed, but it really is a (screen) life saver.