Screen static after root and rom install - LG V20 Questions & Answers

Help needed here. ive sucessfully flashed TWRP recovery and can boot into recovery. ive flashed WETA and rebooted. the screen is nothing but static and i cannot see anything. ive tried reflashing everything and reinstalling the rom. ive tried different roms and cannot solve this problem? any help would be much appreciated. thanks in advance

stunter4ever said:
Help needed here. ive sucessfully flashed TWRP recovery and can boot into recovery. ive flashed WETA and rebooted. the screen is nothing but static and i cannot see anything. ive tried reflashing everything and reinstalling the rom. ive tried different roms and cannot solve this problem? any help would be much appreciated. thanks in advance
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this is normal and a search would have told you the solution after the phone boots up all the way cover the sensor by the front camera turn off the screen once the secondary screen goes off turn the screen back on

I have this problem when installing lineage os cm 14.1 20171205 and now when I install any custom rom now on my t-mo lg v20. How do I know when the phone is all the way booted up though after the flash of the rom?

Related

[Q] Doesn't boot

Hello,
I've got a problem with my gt-i9505.
I've managed to root the phone and install TWRP.
So i decided to install CM10.2 (21-08) and the right gapps for it.
Everything worked very good and I couldn't be happier.
All my apps were back and it was ready to use it!
I turned off the phone and went to sleep.
The next day i turned it on and it got stuck on the bootscreen (not the CM bootscreen, but the SAMSUNG GALAXY S4 bootscreen).
So I tried to do factory reset and install rom again, gapps again, afterwards again wipe dalvik and cache.
But i keep having the same problem. Right now after flashing the rom it doesn't even boot up the first time.
I also tried going back to 10.1, but same problem.
I don't know what to do, i just got my s4. Really hope i can fix it.
Luckily i can enter the recovery. But i didn't do a backup or anything.
Does anyone have any tips on how to get it working again?
ricomana said:
Hello,
I've got a problem with my gt-i9505.
I've managed to root the phone and install TWRP.
So i decided to install CM10.2 (21-08) and the right gapps for it.
Everything worked very good and I couldn't be happier.
All my apps were back and it was ready to use it!
I turned off the phone and went to sleep.
The next day i turned it on and it got stuck on the bootscreen (not the CM bootscreen, but the SAMSUNG GALAXY S4 bootscreen).
So I tried to do factory reset and install rom again, gapps again, afterwards again wipe dalvik and cache.
But i keep having the same problem. Right now after flashing the rom it doesn't even boot up the first time.
I also tried going back to 10.1, but same problem.
I don't know what to do, i just got my s4. Really hope i can fix it.
Luckily i can enter the recovery. But i didn't do a backup or anything.
Does anyone have any tips on how to get it working again?
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Hi,
Look HERE
Put everything back to stock then, try again.
I found some 10.2 ROMS do not like rebooting,and just hang.
Remove the battery and try again normally worked.
malybru said:
Hi,
Look HERE
Put everything back to stock then, try again.
I found some 10.2 ROMS do not like rebooting,and just hang.
Remove the battery and try again normally worked.
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Thanks for replying
I followed the instructions and succesfully installed the official stock rom for my device and region.
But it's still stuck at the samsung boot screen.
And now i can't boot into TWRP anymore either, is that correct?
After that I flashed with the .pit file. But still stuck on bootscreen.
Is there any other way to solve this problem?
idgaf about custom roms or CM10.2 anymore, i just want my phone to work.
Wether it's with custom or with stock firmware.
Really hope I didn't break my phone. :crying:
EDIT:
I wiped cache after flashing, but no data wipe/factory reset. That did the trick.
God i can't be happier my phone finally works again. Now i'm scared to flash a custom rom again. I think i need to install TWRP or CWM again too I'll just wait for now.

Bootloop! Need help, please!

Hello. This morning I decided to install a custom ROM on my S4 i9505. I installed Clockwork Recovery, installed CM12.1, but few hours after, I decided to go back to stock ROM, which I backed up entirely through Clockwork. After everything was restored, I booted up and my phone was stuck at SAMSUNG glowing screen. I managed to go back to recovery and tried to reinstall CM12.1 from backup but that didn't helped me eighter.......CM12.1 gets stuck ever earlier......at Samsung GT-i9505 screen and shows on top of the screen "kernel is not seandroid enforcing". What should I do now? Is this a "pretty" common problem or I'm fked? In this situation can I flash back stock ROM through ODIN?
Thanks in advice,
Andrei.
Solved bootloop, but now there is no Wi-fi
I've solved 1 stupid I did, I need to solve another one. I've told you guys that this morning I've installed Clockwork recovery. Now my Wi-Fi is not working and I think I changed the kernel this morning. Anyone can help me?
Thanks in advice.
Flash the ROM again. Sometimes it takes a couple flashes for the modem to properly work.
Strephon Alkhalikoi said:
Flash the ROM again. Sometimes it takes a couple flashes for the modem to properly work.
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Solved the problem. Thanks for the help. Flashed another stock firmware and everything works.

Phone crashing and shutting down randomly when not On charge

. For the past few days my phone has been crashing and turning off randomly, when the phone is off the charger. The screen just goes black and Shuts down. When I try to reboot the phone it will get upto the boot animation and then freeze and shutdown again. I have to connect my phone to a charger and then reboot, only then does it fully boot up. My battery is 100% btw.
What I have done so far is:
1) flashed the latest build of exodus
2) cleared dalvik and cache
3) flashed an earlier build (25/07) without flashing XPOSED and SUPERSU. However problem still present.
Can someone help please and tell me what other steps I can take. My phones important to me at the moment as I'm away in Turkey for an internship. It's a really strange problem I can't figure out what to do. Thanks alot
Did you try to go bacm for stock oneplus OS? Try to do a full recovery via the tool it will wipe root twrp back to stock. It may help.
Does it happens with other roms?
hi, i solved the problem by flashing stock oxygen. i tried flashing oxyslim and cyanogen however both of them still had the same problem. Anybody have a idea of why this might have happened? it was completely random, and if it was the kernel then it would have been solved when i flashed the other roms...strange
Zeeshansafdar1 said:
hi, i solved the problem by flashing stock oxygen. i tried flashing oxyslim and cyanogen however both of them still had the same problem. Anybody have a idea of why this might have happened? it was completely random, and if it was the kernel then it would have been solved when i flashed the other roms...strange
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It could be that te ROMs u DL were corrupted. This happens, thats why is always good yo verify HASH from your dl ROM and HASH from the developers topic
So you haven't read up on the official CM13 thread about the latest unstable builds?

Flashing black screen after flashing custom roms T-Mobile h918 lg v20

Without fail every time after the lg logo disappears after flashing a custom rom made for the h918 lg v20 I get a flashing black screen. I'm doing a factory reset/wiping davlik cache/ cache/ and data 3 times each time I flash the custom rom and sometimes I even go as far as wiping the internal memory completely even after a factory reset but no matter what I try without fail I always get the flashing black screen right after the lg logo disappears. I even tried upgrading twrp from 3.0.2.0 to 3.1.1.0 and I even tried flashing the no-verity-opt-encryption 5.1 and 6.0 but nothing I've tried seems to fix it so I'm asking for help now since I've exhausted my knowledge on what could fix it. What can I do to fix that issue so I can finally start using custom roms again? Any help would be most appreciated thanks in advance.
P.S. The only rom I could get to flash successfully was the stock twrp flashable t-mobile rom on one of the threads in the rom section of the lg v20 forum so for now until I can fix that issue I'm currently running that so I have a phone I can still use.
raze5115 said:
Without fail every time after the lg logo disappears after flashing a custom rom made for the h918 lg v20 I get a flashing black screen. I'm doing a factory reset/wiping davlik cache/ cache/ and data 3 times each time I flash the custom rom and sometimes I even go as far as wiping the internal memory completely even after a factory reset but no matter what I try without fail I always get the flashing black screen right after the lg logo disappears. I even tried upgrading twrp from 3.0.2.0 to 3.1.1.0 and I even tried flashing the no-verity-opt-encryption 5.1 and 6.0 but nothing I've tried seems to fix it so I'm asking for help now since I've exhausted my knowledge on what could fix it. What can I do to fix that issue so I can finally start using custom roms again? Any help would be most appreciated thanks in advance.
P.S. The only rom I could get to flash successfully was the stock twrp flashable t-mobile rom on one of the threads in the rom section of the lg v20 forum so for now until I can fix that issue I'm currently running that so I have a phone I can still use.
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did you ever find a solution? I'm having the exact same issue and am pulling my hair out trying to get something to work
If the version number of twrp your using is in fact 3.1.xx then that could be your problem all the new roms im almost positive need the newest twrp from pheonix i think it 3.2.3.4 its in the deveopment section...ive heard alot of problems on this device with older interations of twrp. I would start there
https://forum.xda-developers.com/showpost.php?p=77177529&postcount=6
Phoenix591 said:
Official lineage 14.1 only works with pre10p h918, some firmware blobs need changed.
I just built an unofficial for my own use a few days ago that should work, but I havnt gotten around to testing it yet.
lineage-14.1-20180721-UNOFFICIAL-h918.zip
lineage-14.1-20180721-UNOFFICIAL-h918.zip.md5
When lineage 15.1 becomes official the h918 builds will be aimed at post10p. x86cpu is currently doing unofficial builds for both.
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J5 weird flashing problem twrp

Hi. I’ve got a customer with a j5 that I factory reset as she was having problems with it. But now it will only boot to TWRP which must have been installed before she bought it.
I’ve tried sourcing a stock android but with no luck so I tried a few Roms from here today. I can’t get it to work at all! Here’s what Happens.
From twrp I install CM rom and gapps. When I reboot the phone an orange line appears across the screen followed by the Samsung logo. Then the screen starts fading to green. The screen is in full working order when using twrp.
Does anyone have any ideas?!
Thanks
Davidb8 said:
Hi. I’ve got a customer with a j5 that I factory reset as she was having problems with it. But now it will only boot to TWRP which must have been installed before she bought it.
I’ve tried sourcing a stock android but with no luck so I tried a few Roms from here today. I can’t get it to work at all! Here’s what Happens.
From twrp I install CM rom and gapps. When I reboot the phone an orange line appears across the screen followed by the Samsung logo. Then the screen starts fading to green. The screen is in full working order when using twrp.
Does anyone have any ideas?!
Thanks
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More than likely that version of twrp is outdated get a .IMG file of twrp version 3.2.1 and flash the image in twrp. Use this https://forum.xda-developers.com/galaxy-j5/development/recovery-samsung-galaxy-j5-t3769408/page5
If that isn't the problem and the problem you have persists than you have either flashed the wrong version file as there is several types of galaxy j5 with different hardware,
Or the bootloader you have on the phone is the wrong version ie. it has marshmallow bootloader and your trying to flash a ROM that only supports lollipop or vice versa. Links for both bootloaders are here
https://forum.xda-developers.com/ga...5-1-1-bootloader-modem-j500xx-t3566801/page14
This should fix your issues hope it helped

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