Mysterious alternating bootup failure - Samsung Galaxy S20 FE Questions & Answers

I've got a strange bootup problem that I can't find any help on. My S20 FE 5G fails to boot properly on every other bootup. On the failed bootups, it spends 3-5 minutes on the initial Samsung S20 FE 5G splash screen (the one with the android logo). When it eventually gets past that screen, it boots up to the lock screen and prompts me to swipe, but all touch input is ignored. My only option is to hold power and volume down to force a power down. Powering back up, it will boot normally, spending only a few seconds on the splash screen before booting up and functioning as expected. It's been doing this for a long time, and today I finally got annoyed enough to try a factory reset, which hasn't solved the problem. I also lined up a safe mode boot with a failed boot, and the touch screen still didn't work in safe mode. Anyone know enough about how these phones boot up to explain why this alternating pattern of failures might occur? Is it alternating between two images of the OS and one of them is possibly corrupted? Is there any debugging method I can use to try and figure out what's going on?
I'm new here, so if there's a better place to ask this question, please let me know. Thanks!

I'd try flashing a stock rom to the phone, see that fixes it. if it doesn't you should get Samsung to look at it.

Related

Missing splash screen/boot animation after flash

Greetings all!
I have an AT&T Tab that I got a few weeks ago, and yesterday I let my curiosity get the best of me and decided to flash the Euro firmware to enable the calling function. It flashed flawlessly and, popping my personal SIM in, I could easily make calls and text and was pretty happy with the experience aside from two things. First, the home screen was no longer centered (page 3 of 5) but was on the far left on page 1. Petty concern, perhaps, but I really prefer the symmetry of the stock AT&T layout (as well as HTC Sense). I haven't enjoyed any aftermarket launchers so I didn't want to bother when them, and that would have been acceptable enough if it didn't result in the loss of my Media Hub and the $50 credit I got from registering the device with Samsung. Also perhaps a petty concern, but a concern nonetheless.
After getting it fully rooted and adding apps, the Tab would freeze horribly, becoming completely unresponsive and requiring a hard reset. This was after installing Titanium. But by this time, I decided to have a go at reflashing the stock ROM as provided by rotohammer. He did indeed warn us that there was no boot screen, and he was correct. Aside from that the experience is completely stock and just as it should be.
But the reason for this thread is...WTF can I do to get some sort of flash screen and boot animation so I'm not looking at a black screen for ages until the lock screen comes up? I've tried replacing the boot animation ZIP file with some files provided on these forums using Root Explorer, and it has no effect at all.
For some of you brains out there, I'll present a bit more info that may be of some use if you're willing to try to figure out a resolution to this:
Upon powering it on, the Galaxy Tab Samsung image appears for a second or less, then the screen goes black. After a few moments you hear the chime that accompanies the normal Samsung boot animation, but the screen is still black. Finally, after the typical length of time for booting, you can access the lock screen, but you have to hit the power button to get it to appear; it doesn't just light itself up as it should. I actually have to put it to sleep with one push, wake it up with another, then the lock screen appears and I'm using my Tab like normal. There was one time that I pressed the power key as it was booting and I saw the image of the boot animation briefly, but that's not typical.
Another thing that might help you figure out the root problem here is that I can't boot in Recovery. I power off completely, hold down the Power and Volume Up keys until I see the backlight come on, but the screen remains black. I can't actually see any of the text on the screen, but I know from experience that the device is in Recovery because if I hit Power, it reboots again, just as it would if pressed in Recovery (when the reboot option is highlighted).
When I put it in Download mode, I do see the normal screen with the Android shoveling.
Surely the inability to see splash screens and boot animations is related to not being able to see the Recovery menu, right? Can anybody help me get a splash and animation going on this without affecting anything else? I know that this too may sound petty to some, but I really want to make this the perfect tablet experience, like it was before I started messing with things.
I should also note that the shutdown animation works just fine. So far the entire experience seems pretty normal once you get past the boot.
Several peeps have had a blank boot screen issue after flashing a rom on att tabs; myself included. The blank boot screen usually has a thin white line, too.
Maybe check out this thread for some ideas: http://forum.xda-developers.com/showthread.php?t=928076
Sent from my GT-P1000 using XDA Premium App
fwelland said:
Several peeps have had a blank boot screen issue after flashing a rom on att tabs; myself included. The blank boot screen usually has a thin white line, too.
Maybe check out this thread for some ideas: http://forum.xda-developers.com/showthread.php?t=928076
Sent from my GT-P1000 using XDA Premium App
Click to expand...
Click to collapse
Thanks for the link! I looked around but didn't find any proposed fixes. Obviously overlooked this one.
However, that fix seems to be for people who go from stock to custom. In my case I went from stock to Euro and back to stock, but the resulting symptom is the same as described in the above link - except I have no white line, it's just black.
Given that I went back to stock and have this problem, will the above referenced fix work for me, or am I FUBAR? I don't want to risk bricking it just to fix the boot animation issue.
I cannot say for certain if it will help in your case. But here is my sequence of events that cause blank screen and when I applied the fix in the link:
Stock (non-blank boot)
Jmev4 rom (blank boot screen started)
Jmiv2 (never bothered to fix boot screen)
Overcome 1.3.0 failed install due to blank boot screen and cant 'see' recovery mode
Jmiv2 again fine but with blank boot screen
Follow link to fix blank boot
Jmiv2 now with fixed boot screen
Overcome 1.3.0 success!
So maybe you can apply fix to stock?
Sent from my GT-P1000 using XDA Premium App
Hopefully some of our dev wizards can chime in? I'm wary of trying something out that might turn my Tab into an expensive scrying mirror.
I ran the fix for the blank boot screen. Odin declared the flash a success but I can confirm that it didn't fix a goddamn thing! There is absolutely no change in the device whatsoever after installing the jj4 bootloaders.
Just to confirm, it was downloaded as a .ZIP file which contained a .TAR file. It was the .TAR file that I added into the PDA field; that was correct, right? Or was I to insert the .ZIP in the PDA field?
Does anybody have any idea why there's no visible splash screen, boot animation or recovery mode screen? Rotohammer: are you still alive? I got this stock ROM from your post; surely you've figured something out by now, no?
If Samsung/AT&T finally release 2.3, do you think installing it will resolve this issue? Where is everybody that could help with this??? Have they all forgottten about the Tab and gone on to bigger screens/greener pastures?

Frequently frozen phone, software or hardware issue?

Hi all,
My Galaxy S5 has been a real bear lately. At least once every single day, the phone completely locks up. Usually it's with the screen on, but other times has been while the screen is off and I can't get it to turn on. The weird part is that if there's an animation on the screen (like the battery charging animation), the animation still plays but everything else is just stuck. The only way to fix it is to battery pull or hold down the volume down + home + power buttons and force it to reboot.
This happening every day, at least once if not more. I've flashed different ROMs hoping that it was just a ROM that was the issue, but it doesn't fix it. When I flash the ROMs, I make sure to wipe everything except the SD card so it's a very clean install, but alas no bueno.
I'm about at my wits end and ready to go to the AT&T store today to turn in my phone and get a Nexus 6 or Galaxy S6, but thought maybe someone here may have ran into the same issue and was able to resolve it.
any help appreciated - thanks!

Boot loop on initial flash screen

On rooted ZV6. I was using the phone as usual. I went to open an app (Weather Channel, though I don't believe that matters) and the phone froze. It did the self-restart, however it sits at the very first LG flash screen, turns off for a second, then starts again. Continual boot loop.
I've popped the battery, tried a different battery, tried with the SD in and out, all with the same results. I tried holding down volume down and power, it gives me the booting into recovery screen, then goes back into the boot loop.
I've seen the talk about the ZV9 OTA, but there was no sign of an update in progress when the system crapped out initially.
If I'm reading the code under the back cover right, the phone was made back in May, which makes me worry that it's the known faulty hardware issue. Does anyone have any ideas I can try before going through the hell of riding Sprint for a replacement? I would be forever in your debt for something to save my phone. Thanks in advance for any advice.
EDIT: After screwing around with holding down volume buttons at random times, it will sometimes get to the Sprint Spark animation, but no boot sound, then as I was typing this edit, it magically booted proper, and powered down, and is boot looping again. What the hell.

note 8 sxreen crash after reboot - possible issue with 9.0 beta

Hi guys
Just a quick one. Got a strange issue with the screen on my note 8 and just seeing if anyone has had the same issue or any idea on a fix.
Last week updated to the 9.0 beta and all seemed to be going well with no notable issues just a bit of lag here and there. However last night I turned my phone off and when I came to turn it back on this morning it started to boot as normal I entered my password successfully and it started to boot. As soon as the password registered and the unlocking pad lock appears it quickly shifts to the bottom right hand corner instead of the centre as normal. The phone continues to boot and from then on the screen just goes black and is unresponsive. The handset is on cause people can still ring, notifications still get received and all the hardware buttons make noise as if they are working. The screen will just not turn on. If I try doing a soft reboot with the power and volume down I can start the phone and the Samsung logo comes up as normal and the pin screen as normal but as soon as I enter my pin the same issue happens. If I hold the power button on its own to turn off the phone the multi menu (reboot, power off, emergency) all briefly appear but are enlarged and sitting on the right of the screen.
Any ideas guys, cheers.
Try reinstalling Oreo back onto it. It could be an issue with the Beta Version of Pie that you installed on your device.
The beta software is intended for this very purpose, you found a problem, then you report it to the releaser to be fixed, the creators of the software are the ones that will evaluate and improve the software, you see, it did not work for you, just try to reinstall it, if the issue persists, provide feedback to samsung, and flash a stable firmware
Possibly this bug Pie Beta + Secure Startup + WQHD = Black Screen?
It happened to me too. I installed over my existing UAE firmware with Indian one then the one ui update. After reboot got the same blank screen issue. I then did a factory reset and everything is back to normal for the last couple of days with improved battery life probably due to the reason that many region specific Samsung app like Samsung pay doesn't work.
So had a bit more of a play when I got chance and I managed to resolve the issue. Still being hit with the same problems for some reason I tried unlocking the phone again but sideways (don't ask not sure why) and the screen unlocked. From then on phone worked completely normal until next reboot. Same thing every time until I hold phone on its side and unlock with the fingerprint reader.
I've since reverted back to 8.0 and sent feedback over. I'm gonna try testing again weekend see if I have same luck.
Cheers for the replies guys, hope anyone else has this issue the comes across this.
you must disable secure start up
I had the same issue after updating to beta 1 with secure boot enabled. I wiped the phone and it started as it should, since I couldn't unlock the phone even with fingerprint. I noticed that the screen was only showing for few seconds the 1/4 of the image (unlock sim with PIN).

Screen stopped working randomly, now only notification light flashes.

Hello,
the other day I had my phone on the sofa next to me, working fine, I leave it there 30 min, pick it up, and the screen has all kinds of weird glitches. After a couple hours now the screen is completely blank and whenever I press the power button the notification light blinks a couple times. It's kinda weird tho because touch seems to be working (if I boot to recovery, then tap on the screen the phone vibrates just like TWRP buttons) and I can still boot to fastboot. Of course when I say boot it means that `fastboot devices` shows the device ready, but I can't actually see anything on the screen. I'll try flashing the latest MIUI now, does anyone know what this could be? I mostly just like to know whether I should try changing the screen only or if it's likely to be a bigger problem and I'd be better off replacing the phone entirely. Kinda sad, I loved this phone. Thanks.

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