[Q] tab true black screen of death - Galaxy Tab General

okay so i flashed my tab and now the only thing that works is the flash when i power the thing on i tried putting it in download mode (dont know if it worked but tired a lot of times) flashed back to original and it says it passes but still the only thing that turns on when i press power is the flash and it gets really bright and dark at times also it wont turn on inless its plugged into a power source

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[STRANGE!] Screen won't turn on at all. Can get into Download mode. Screen stays off.

As the title explains, I can get into Download mode but screen wont turn on. I flashed Prism Barebone KK ROM and it's been like that since that. Luckily I know how to get to Download mode without the screen being on. I am flashing stock KK I grabbed from Sammobile right now but what if it doesn't work? Prism ROM does have that no bootanimation bug.
It's not a battery issue, I have 3 stock and one extended battery thats fully charged. So def not battery.
Okay so it flashed the stock ROM through Odin. DIdn't restart on it's own. I let it be for a while, it was connected to laptop, assuming my screen may have died I thought when it gets into OS I'll hear a beep on computer or Odin would detect it, or device manager. Nothing.
So I hit power while USB was connected, the boot logo came on (the Galaxy S4 words) and it stayed there for about 2 mins and turned off i think. Now the power button is unresponsive. I am gonna keep it plugged to the wall.
For reference, I downloaded "I9500XXUGNH2_I9500OJVFNG1_LYS.zip" from Sammobile. [Yes I have the i9500]
Edit/Update: So the phones screen goes on and off with boot logo WITHOUT BATTERY INSERTED! How strange is that........
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SilentRazor said:
For reference, I downloaded "I9500XXUGNH2_I9500OJVFNG1_LYS.zip" from Sammobile. [Yes I have the i9500]
Edit/Update: So the phones screen goes on and off with boot logo WITHOUT BATTERY INSERTED! How strange is that........
.
Click to expand...
Click to collapse
Out of curiosity, when you insert a charged battery in your S4. Does the device immediately vibrate? If you were having issues with your power button, you would feel the device constantly vibrating because when Samsung S2 S3 S4 power buttons go out, they are usually stuck in the on position. It is extremely rare to have a power button stuck in off.
c1aytron said:
Out of curiosity, when you insert a charged battery in your S4. Does the device immediately vibrate? If you were having issues with your power button, you would feel the device constantly vibrating because when Samsung S2 S3 S4 power buttons go out, they are usually stuck in the on position. It is extremely rare to have a power button stuck in off.
Click to expand...
Click to collapse
Power button doesn't seem to be an issue but it's unresponsive. No the phone doesn't vibrate on battery plug.
bump
bump

samsung galaxy s4 gt-i9505 can't access recovery and download mode bricked

Hi,
I have a problem regarding my unit. I am not very good in this stuff because I just started. I had someone root my phone for me and I learned how to flash custom ROMS. I had a custom ROM flashed and my phone was working fine. then I got bored so I flashed a different ROM but then I noticed some annoying features of the ROM so I switched back to last custom ROM I had ( the first custom ROM I flashed). One night my phone got fully drained so it turned-off. When I plugged the charger in the phone showed a symbol of a battery charging for about 3 seconds then it turned off. It did not turn on again even after I pressed the power button. I took out the battery and plugged it in the phone and then the phone automatically turned on and showed the name of the unit only (white text on black background: "SAMSUNG GALAXY S4") and on the top left of the screen appeared some text ("kernel is not seandroid enforcing" and below it is " set warranty bit: kernel"). I cannot access recovery and download mode( in a way) because when I plug in the battery and hold power + home button + volume up, in the top left corner of the screen, it states that it is in recovery mode but even before the TWRP could start, the phone would turn off immediately. Same goes for the Download mode. I can reach up to the part where I would choose whether to continue or not to download mode but even before I could make a choice, the phone would shutdown immediately. I have been using custom ROMS for almost a year now and never had a serious problem (aside from the part where my phone at times suddenly reboots for no reason at all) until that night where my phone ran out of battery power. Now i tried charging the battery using a clip charger because I was thinking that maybe the charging port of my phone is defective, but as it turns out, I didn't have any luck at all. I tried to plug in the battery again and the phone turned on automatically (without pressing the power button) but the problem remains the same. can anyone please help me regarding my phone problem? it would be very much appreciated.
Thank you
vincezabdiel said:
Hi,
I have a problem regarding my unit. I am not very good in this stuff because I just started. I had someone root my phone for me and I learned how to flash custom ROMS. I had a custom ROM flashed and my phone was working fine. then I got bored so I flashed a different ROM but then I noticed some annoying features of the ROM so I switched back to last custom ROM I had ( the first custom ROM I flashed). One night my phone got fully drained so it turned-off. When I plugged the charger in the phone showed a symbol of a battery charging for about 3 seconds then it turned off. It did not turn on again even after I pressed the power button. I took out the battery and plugged it in the phone and then the phone automatically turned on and showed the name of the unit only (white text on black background: "SAMSUNG GALAXY S4") and on the top left of the screen appeared some text ("kernel is not seandroid enforcing" and below it is " set warranty bit: kernel"). I cannot access recovery and download mode( in a way) because when I plug in the battery and hold power + home button + volume up, in the top left corner of the screen, it states that it is in recovery mode but even before the TWRP could start, the phone would turn off immediately. Same goes for the Download mode. I can reach up to the part where I would choose whether to continue or not to download mode but even before I could make a choice, the phone would shutdown immediately. I have been using custom ROMS for almost a year now and never had a serious problem (aside from the part where my phone at times suddenly reboots for no reason at all) until that night where my phone ran out of battery power. Now i tried charging the battery using a clip charger because I was thinking that maybe the charging port of my phone is defective, but as it turns out, I didn't have any luck at all. I tried to plug in the battery again and the phone turned on automatically (without pressing the power button) but the problem remains the same. can anyone please help me regarding my phone problem? it would be very much appreciated.
Thank you
Click to expand...
Click to collapse
Your power button is stuck/faulty.
It's common problem on the s4. Try to wiggle it loose or replace it.
Lennyz1988 said:
Your power button is stuck/faulty.
It's common problem on the s4. Try to wiggle it loose or replace it.
Click to expand...
Click to collapse
I'l try. thank you very much!
about the part where my phone suddenly shuts down after showing the unit name "SAMSUNG GALAXY S4"? do you have any idea how to solve it? thank you
vincezabdiel said:
I'l try. thank you very much!
about the part where my phone suddenly shuts down after showing the unit name "SAMSUNG GALAXY S4"? do you have any idea how to solve it? thank you
Click to expand...
Click to collapse
It's the power button.
Your device will not turn on because the power button is stuck in the pressed position.
Replace or try to loosen it.

Hard Bricked Samsung galaxy s7 edge

Hi! I managed to hard brick my galaxy s7 edge and i wanna see if someone here knows if its hard bricked or soft.
Got root and had renovate rom 2.0 ( n7 port) then i wiped my phone and flashed renovate 3.3 (s7 edge stock)
my phone worked fine on startup and i started to restore my old apps through gmail. i thought it would take a while so put my phone in my pocked and let it be fore about 20 minutes then when i took it up it was complete dead. i had about 67% before it died i tried everything (vol up down home all together) for at least 15+ sec. had it charge over the night ( i noticed that the phone didnt get warm or any leds shown) in the morning i tried everything again and nothing. when i connect my phone to my computer i hear the connect sound and then it disconnect a sec later. if i hold power button down and connect it ( and dont release power) my computer recognize it as onyx8890 and if i release powerbutton it disconnects. cant boot it in any way whatsoever. so what do you think? its only a week old thats the worst part of it!
I have left it to the store I bought it from for warrantable but its still rooted and have a rom on it. well if its complete dead they cant see if its rooted so thats one good thing.
still want to hear you opinion
sorry for bad english
so, from what I understand, u cant boot into any mode, are u even able to see something on screen? (logo, boot screen, etc.) U can try JIG (it somehow make any samsung device go to download mode). otherwise idk.
Hi guys, I have the same problem with my S7 Edge.
Can anyone help?
OK. So I managed to recover my phone.
The phone was dead because of a software crash(nothing on display, no LED light, power+vol. down for reset not working) and when connected to my PC - nothing (just a connect and after 1 sec. a disconnect sound).
But if I kept the power button pressed without letting go, my PC would detect the phone as exynos8890.
I tried to keep pressing the power+vol. down while connected to PC and I realized that the combo worked because after ~7 seconds the phone would disconnect and reconnect itself (but still as exynos8890).
But I tried a different approach. While connected to the PC I tried to keep on pressing power+vol. down. And I could hear that it disconnected and reconnected. But I did not let go of the buttons. And again a connect and disconnect. And again. And after literally 5 minutes of the buttons kept pressed down without letting go and countless reconnects there was finally a change. The disconnect sound was not heard after the connect sound. At that point I stopeed pressing the buttons and when I looked at the phone I could see that the battery icon appeared. Since the phone was connected to my PC, after 1 min. the battery started charging (it was charged 31%). And after that my phone booted fine.
wow
Hi I have just bought an s7 which turned out to be a Korean G930L but I cant get any response out if it apart from the 2 bottom leds and and the blue one. No response from trying to get into recovery or download mode, basically a black screen though it does vibrate on what i think is start up. It is found by pc and Odin and charges ok, I can tell as I can see properties on pc. But no other response. Is it possible that the previous owner tried to root it using non korean rom or TWRP? Any advice on how to fix either getting TWRP on or screen to light up. I am sorry for being so vague I have pulled it apart and checked all of the connections, screen, motherboard etc but nothing. Or chuck it out or put back on eBay. I tried your idea but it only booted once in that 5 minute period so I tried without it plugged in and rebooted several times but still no screen response.

Boot Logo Repeating

I have a galaxy s4 (i9500) and got it in used condition, a year ago. Never suspected a single problem in it.
Today I powered off my mobile for charging then after 25 minutes I took it off. I held the power button then I saw my boot logo(Where there is written Samsung Galaxy S4 GT-i9500). That logo kept showing as usual for 2 seconds and screen went black and again that logo appeared for 2 seconds and screen gone black and again it appeared, so, I'm stuck in kinda loop not a bootlooop exactly(maybe because bootloop refers to being stuck on boot screen while in my case its boot logo). I then removed the battery and inserted it back after an hour and as soon as I inserted it back the mobile itself turned on as if I held power button but this time again I was stuck in that loop. Moreover when I tried going into download mode, I didn't even need to hold the power button along with the volume down and home, it itself proceeded to confirmation screen of odin mode. And after that confirmation screen appeared saying that whether I really want to boot into download mode, disappeared itself after like 3 or 4 seconds even though I didn't press any key. And in case I press vol up key confirming to boot to download mode, then it again takes me to that loop. I'm too much confused . I can't even flash the firmware as it won;t boot to download mode neither am I able to boot into recovery.
Now do u really think the problem might be the power button(Which is maybe stuck in the state of pressed).
Or else it can be the battery coz my battery is also just average not too good?
I also inserted the command( in build.prop file) for enabling nav. bar and the code was correct but I never rebooted after inserting that. this was the first time I rebooted after that.
SOrry for some bad English.
Do you have something like this? I'm now having problem with getting my phone back to work...
https://youtu.be/HxnV-tn2vpA
From what you say it seams like power button problem, try to start the phone and connect it to the charger. When it start take out the battery, it will be powered by charger and you will eliminate battery problem.

Samsung galaxy a20s wont boot

hi everyone hoping u can help have a Samsung galaxy a20s that wont boot i can access it by holding down volume - and power after a few minutes it will turn on but wont boot into recovery instead it boots normal and wont charge once turned on it completely shuts down again, also if plugged instead of charging it vibrates and looks like the display wants to turn on but instead it turns off and once again vibrates and display flashes what looks like to be the back-light sorry or not being specific can someone help
Ok
death1426 said:
hi everyone hoping u can help have a Samsung galaxy a20s that wont boot i can access it by holding down volume - and power after a few minutes it will turn on but wont boot into recovery instead it boots normal and wont charge once turned on it completely shuts down again, also if plugged instead of charging it vibrates and looks like the display wants to turn on but instead it turns off and once again vibrates and display flashes what looks like to be the back-light sorry or not being specific can someone help
Click to expand...
Click to collapse
Connect to computer and hold down both volume keys
If that brings you to the download mode you can reinstall all your firmware using odin
physwizz said:
Ok
Connect to computer and hold down both volume keys
If that brings you to the download mode you can reinstall all your firmware using odin
Click to expand...
Click to collapse
i have the a207m and unfortunately it did not work thanks anyway
so i could actually see it turn on and got the unlock screen and saw that battery was dead and did not have a charging symbol it turned off 2 seconds later. can it be the baterry that causes this?
It can be the battery but it could be a dirty charge port or even cable. When the battery is extremely low you're not going to be able to flash it, nor should you try. See if you can get anything out of the charger connect area on the phone.... maybe it's lint.. At this point there isn't much else besides ensuring you have a clean connection.
mindlery said:
It can be the battery but it could be a dirty charge port or even cable. When the battery is extremely low you're not going to be able to flash it, nor should you try. See if you can get anything out of the charger connect area on the phone.... maybe it's lint.. At this point there isn't much else besides ensuring you have a clean connection.
Click to expand...
Click to collapse
i have actually checked it and it did seem dirty cleaned it and nothing changed however i did do the same as before and for some odd reason when i tried to power it on it booted for a split second turned back off and booted into recovery formatted the phone tried to see if any error popped up but nothing happend it formatted correctly and booted again like nothing yet it still didnt charge and i still have the same problem
death1426 said:
i have actually checked it and it did seem dirty cleaned it and nothing changed however i did do the same as before and for some odd reason when i tried to power it on it booted for a split second turned back off and booted into recovery formatted the phone tried to see if any error popped up but nothing happend it formatted correctly and booted again like nothing yet it still didnt charge and i still have the same problem
Click to expand...
Click to collapse
https://forum.xda-developers.com/galaxy-a20/how-to/crash-recovery-t4068369

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