Phone is on a black screen after boot - Android Q&A, Help & Troubleshooting

So I flashed magisk, RMM bypass, and boot.img. I wiped data, format data, etc... Basically I followed a guide to root my model.
So everything was going well, then I tried to boot up my phone, the big text with my phone model popped up, the usual, and then, a black screen appeared, I thought it was just the first boot thing so I waited for like 30 minutes and my phone was still on a black screen.
I can access Odin mode and TWRP, so at worst, I'll have to flash my stock firmware to maybe fix it.
I'm new to this and this has never happened before so I don't know what to do, any ideas?

@Saffron20
Probably the famous Black-Screen-Of-Death that everyone fears: perform a Factory Reset.

Do a factory reset, if it doesnt work reinstall the stock rom

Related

[Q] Stuck on Samsung Boot Logo On MIUI

So i decided to format system (Don't ask me why I honestly don't know ) and after i did whenever i reboot it it stays at the Samsung Galaxy S2 boot logo. I can't reinstall Miui because somehow it says it can't open it because of it's "bad". I also tried to wipe data/factory reset, which did nothing. Any help please? Oh and i was too stupid to have a nandroid
If you formated /system then you basically wiped your OS.
You shouldn't have wiped your data/factory, that could have been kept there if you stayed on MIUI...
You have to reflash a rom, doesn't matter which since you wiped everything.
Since you know this kind of information.Does it erase the recovery mode too.Do you know where i go about following the steps to reinstall the Os .I tried Odin and never booted to the Graphic user interface.It booted back to the charging symbol and no charge.The charge look red for a long time.I think it maybe a bad battery,software.Who knows what the heck happened.I was rooting my tablet and it went fine.Once i tried to install a software to install lingeage os.That is when it didn't want to reinstall any software to 100%.Sorry to confuse you.I tried getting advice and more info.

Screen won't unlock, can't restore backups, flashing stock kdz req. hard reset

Hey everyone! Lately i've been trying to unlock my BL and never really got to a solution, me being the total idiot I am, I was messing around with fastboot to see if I could do something with the "hidden" menu while holding down the down volume while fast booting. I tried first, flashing ics xloader and u-boot on jellybean and without booting the phone I did the Jellybean xloader and u-boot. When I booted the phone the normal screen faintly had the same weird screen stripes fastboot has. I flashed v20f and the phone didn't boot, it hung at lg, I did a hard reset and it booted. I rooted and tried to use cwm restore to restore all my apps and I keep getting error while restoring \(system, data, cache). I can however create new backups and restore them.
When I use the phone as is, when I lock it sometimes, then try to unlock it, the phone stays black but responds to touch. I noticed if I managed to change the brightness the screen would go back to normal, but would eventually crash. Everytime I try flashing kdzs' I have to hard-reset. The phone also connects to the pc but only as the installer for drivers.
I actually don't know where to get my cwm logs, so if someone could tell me real quick that would also be appreciated.
P.S. I created the backup before everything, when the phone was fine.
AlbinoCookie said:
Hey everyone! Lately i've been trying to unlock my BL and never really got to a solution, me being the total idiot I am, I was messing around with fastboot to see if I could do something with the "hidden" menu while holding down the down volume while fast booting. I tried first, flashing ics xloader and u-boot on jellybean and without booting the phone I did the Jellybean xloader and u-boot. When I booted the phone the normal screen faintly had the same weird screen stripes fastboot has. I flashed v20f and the phone didn't boot, it hung at lg, I did a hard reset and it booted. I rooted and tried to use cwm restore to restore all my apps and I keep getting error while restoring \(system, data, cache). I can however create new backups and restore them.
When I use the phone as is, when I lock it sometimes, then try to unlock it, the phone stays black but responds to touch. I noticed if I managed to change the brightness the screen would go back to normal, but would eventually crash. Everytime I try flashing kdzs' I have to hard-reset. The phone also connects to the pc but only as the installer for drivers.
I actually don't know where to get my cwm logs, so if someone could tell me real quick that would also be appreciated.
P.S. I created the backup before everything, when the phone was fine.
Click to expand...
Click to collapse
There are save log to sd option in cwm advanced menu.
Try to format /data before restore backup. This may help you boot pass LG logo.
Sent from my LG-P768 using xda app-developers app
Recovery log
Heres the cwm log. From what I could tell, is there something wrong the eMMC?

[Q] android problems with vibrant

I recently tried to reset a phone to factory conditions and used ODIN. I followed every step from a Youtube video for the same model of phone and it seemed as if everything was fine. It even said "Passed" at the end of the reset process, however, when it started back up, the buttons at the bottom of the screen lit up but the screen itself would not turn on at all after the reset. Before the reset, everything was fine. Please and thank you for the help, all is welcome...
Did you try odidning back to stock again?
vibrant
That is when this happened. I got the phone from a friend and he said that i could have the phone but he tried to root it and the only thing that went wrong was there is now a warning that comes up right away for low storage so he said he concluded that the partitions were mad up in the process of rooting it. So i figured i would just download ODIN and revert everything back to stock conditions. I downloaded ODIN with the tar file and the one for the PDA as well. I followed every step meticulously so i know i did it right but now the phone will turn on and it looks normal but then the screen goes black and only the touch buttons at the bottom light up. Additionally, i can get it into download and recovery mode still. i Have tried to clear cache data and all user data as well from the recovery mode if that helps.
So you can enter recovery. Have you tried flashing a Rom file? Then rebooting?
epicboy said:
So you can enter recovery. Have you tried flashing a Rom file? Then rebooting?
Click to expand...
Click to collapse
I have no idea how to do that
Is it clockwork or is it the stock Samsung recovery? What options do you have in recovery menu?

[Q] Stuck in bootloop and recovery vanished

Ok, so something seems to have gone very wrong with flashing my phone :S
I managed to get recovery working yesterday, and followed the steps in this thread, http://forum.xda-developers.com/xperia-z2/general/4-4-4-creating-rooted-update-package-t2933155 , to create a pre-rooted 5.0.2 image. I put it on the external SD card, booted into recovery and installed the flashable zip, then used flashtool to flash with the instructions (though I also cleared Appslog, Cache and Data to get a fresh install). This went fine and everything appeared to be ok. I then tried to get the Xposed Alpha installed, but after that whenever the phone was rebooting it just hung if trying to boot to Android. I tried re-flashing with Flashtool, but still got the same issue. Would boot fine the first time, but then any restart it would just hang and crash out. Tried clearing the cache from recovery, but no difference.
So today, I went into recovery, re-installed the flashable.zip, then powered off the phone and flashed using flashtool, just as I had yesterday. Now though, my phone wont boot. It shows the Sony logo, then a blank screen, then restarts. Even worse, it will no longer boot into recovery. I hold the volume down button when the LED shows, nothing. I try holding the volume down button all the way through several bootloops, nothing.
I've tried to re-flash using flashtool which goes through the process ok, I can hold the volume down button and connect the cable once its in the process of rebooting, and it goes through all the process fine. It then powers off as expected and I can just disconnect and power on the phone. But it's still stuck in the bootloop and I don't have TWRP recovery.
Is there anything I can do to get my Z2 working?
Update - Re ran flashtool, this time not excluding system, only Partition. It now gets a little further, going to "Powered by Android" and giving the purple wavy lines, but after a minute or so it just hangs and restarts again. And still no recovery sadly....
I think I've got it sorted...
Used Flashboot again to do a flash, excluding System and Partition. This time the phone does boot up normally. The downside being that my root was gone. Despite my flashing a pre-rooted image, it seemed to just put a stock image on. And my recovery is still mysteriously gone.
In the end, just to get things completely back to a stable/stock starting point for later on, I ran a repair from PC Companion. Seems I was in the none rooted position anyway so figured I'd get myself to a more certain position. At least this way I can wait for someone to come up with a root for 5.0.2 so I can root and get recovery back.

[Q] Factory reset from settings --> boot loop

My daughter's i9300 started resetting itself without control. Today it got unmanageable and a successful boot became impossible.
Looking around, I found a thread suggesting that the power button switch is the culprit.
Indeed, after removing the switch, everything worked fine. Had major issues starting the phone, but eventually it started, so I was good to go.
I rooted it, installed latest TWRP and Resurrection ROM. The ROM was a random pick more or less, I had it on my LG G3 at some point and I wanted lollipop.
All fine and dandy, I was able to get into the phone. However, data wasn't wiped even though I selected it for wiping in recovery (probably didn't select the right thing...). So I went to settings and chose factory reset with wiping all data.
This lead to phone rebooting to recovery, but TWRP logo just flashes every few seconds without ever getting to recovery itself.
How can I make this phone work again? Any ideas?
Boot into download mode then flash a full stock rom with Odin. If that works then factory reset in recovery before testing.
You may find the firmware won't flash, as it sounds like your nand memory is worn.

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