t870 S7 unlocked bootloader stuck in loop - Samsung Galaxy Tab S7 / S7 Plus Questions & Answer

sm-t870 unlocked/rooted stuck in bootloop
cannot enter recovery or download mode, or even seem to shut the tablet completely off.
any combination of buttons turns the tablet on with the message "bootloader is unlocked press power key to continue"
so holding power+volUP, must be let go to press power which seems to interrupt the button combination
power+volDOWN seems to shut the tablet off for 5 seconds but it automatically turns back on.
having plugged into laptop seems to make no difference.
help!

Hi man, have you fixed this issue? I'm having the exact same problems as yours. I updated my Magisk it just went bootloop.
Thanks!

Plug into PC then Power+Volume Up got me into recovery mode

Related

[Q] galaxy tab2 10.1 wont enter download mode

I have new galaxy tab 10.1 which I am planning to root, however I cannot get unit to enter download mode. I have tried unsuccessfully at least 20 times using the recommended method of turning the unit completely off then holding the vol-/power buttons. I press the vol- slightly ahead of the power button and hold. All I get is the samsung splash looping over and over with no download or recovery menu icons popping up after the samsung splash. Once I let go, the tab will go into android recovery mode with the option to reboot which takes me to where I started. I have followed all of the tutorials to the tee. Is there another way to get to download mode? Should I take it back if this indicates a more serious problem.
I have also done a factory wipe/reset to no avail. Will vol+ / power do anything?
thanks for your interest I would appreciate any help.
emonjato said:
I have new galaxy tab 10.1 which I am planning to root, however I cannot get unit to enter download mode. I have tried unsuccessfully at least 20 times using the recommended method of turning the unit completely off then holding the vol-/power buttons. I press the vol- slightly ahead of the power button and hold. All I get is the samsung splash looping over and over with no download or recovery menu icons popping up after the samsung splash. Once I let go, the tab will go into android recovery mode with the option to reboot which takes me to where I started. I have followed all of the tutorials to the tee. Is there another way to get to download mode? Should I take it back if this indicates a more serious problem.
I have also done a factory wipe/reset to no avail. Will vol+ / power do anything?
thanks for your interest I would appreciate any help.
Click to expand...
Click to collapse
I seem to recall that at least one variant swapped the button around. In any case, it can't hurt to try volume up.
Here's what you do - first, shut the device off by holding power down and waiting for the confirmation.
Then, when it's off, hold the volume down button (to the left side, next to the power button.) Holding that down, press and hold the power button. When you see it light up, release the power button but continue to hold volume down until you see the recovery/download icons.
If doing that doesn't work, try volume up and power. Good luck!
Ill try your suggestions. thank you
emonjato said:
Ill try your suggestions. thank you
Click to expand...
Click to collapse
I'm having a similar problem. I have a galaxy tab 10.1 wifi that I rooted immediately when I got it. I havn't used it in about 4-5 months. I've already done all the odin and download stuff, but now i want to update my cwm and install a JB rom (I'm currently using aokp). I'm having a funny problem with it now -- Its difficult to turn on and impossible to get into download mode.
In order to turn on my tab, I have to hold down the power, connect the charging cable and get the download screen to turn on, then hold down the power again, wait for the screen to turn off, unplug the power and hold the power button until hopefully it turns on again. And this doesn't always work, sometimes I have to do it a few times. But whenever i've tried do the same thing that gets the tab working normally -- only holding the down volume as well as the power, Nothing happens.
Now once its on and working, things work great, but turning it on is a pain and its impossible for me to bring up the download or recovery option.
I've also tried to 'reboot to bootloader' and that doesn't work, although i can still 'reboot to recovery'
Any tips?
scndthe2nd said:
I'm having a similar problem. I have a galaxy tab 10.1 wifi that I rooted immediately when I got it. I havn't used it in about 4-5 months. I've already done all the odin and download stuff, but now i want to update my cwm and install a JB rom (I'm currently using aokp). I'm having a funny problem with it now -- Its difficult to turn on and impossible to get into download mode.
In order to turn on my tab, I have to hold down the power, connect the charging cable and get the download screen to turn on, then hold down the power again, wait for the screen to turn off, unplug the power and hold the power button until hopefully it turns on again. And this doesn't always work, sometimes I have to do it a few times. But whenever i've tried do the same thing that gets the tab working normally -- only holding the down volume as well as the power, Nothing happens.
Now once its on and working, things work great, but turning it on is a pain and its impossible for me to bring up the download or recovery option.
I've also tried to 'reboot to bootloader' and that doesn't work, although i can still 'reboot to recovery'
Any tips?
Click to expand...
Click to collapse
I have almost the exact same problem...
Volume up puts me into download mode and i can connect with Kies but it wont do the JB update
Voulume down ... nothing just boots
if i let it try to do the OTA update it will freeze at the boot screen and stay that way till the battery dies.
To get it to work again i have to do almost exactly what was decribe above..
I have no recovery options at all.
also my Tab is "NOT" rooted
scndthe2nd said:
In order to turn on my tab, I have to hold down the power, connect the charging cable and get the download screen to turn on, then hold down the power again, wait for the screen to turn off, unplug the power and hold the power button until hopefully it turns on again. And this doesn't always work, sometimes I have to do it a few times. But whenever i've tried do the same thing that gets the tab working normally -- only holding the down volume as well as the power, Nothing happens.
Now once its on and working, things work great, but turning it on is a pain and its impossible for me to bring up the download or recovery option.
I've also tried to 'reboot to bootloader' and that doesn't work, although i can still 'reboot to recovery'
Any tips?
Click to expand...
Click to collapse
I had a similar problem initially... the screen would just flash the "downloading" message, but the tablet wouldn't mount/connect to my laptop. Here's the solution:
1) launch odin
2) connect usb cable to laptop only
3) power down tablet
4) hold down the power volume down buttons together
5) when you see the downloading message, let go of the power button
6) let go of the volume down button (now just displays "downloading" message, but nothing happens
7) press volume UP
8) you'll get a message about installing custom ROMs and be given the option to do so by pressing volume UP again
9) the tablet mounts and connects to odin
10) from there follow the instructions for flashing recovery via odin (i.e., using PDA button...)
FYI just double check the guides again regarding download and recovery modes. In the thread title you mention Tab 2. This is the forum for the original Tab not the Tab 2. Both devices have different methods and key presses to access the various modes.
Sent from my GT-P7510

Stuck in boot loop with a faulty home key, Cant get to download mode on the S6 Edge.

Hello, all.
I have a tricky problem here.
Let me tell the background of the problem first.
Basically, I flashed cf-autoroot using odin on my phone and it restarted all perfectly, then I restarted it to download mode using pc command "adb reboot download" since trying from my phone always gets stucked on download mode warning screen, PRESSING VOL UP DOES NOTHING.... When I reached download mode, I FLASHED TWRP V2.8.0 using ODIN, it went directly to home screen not recovery, then I powered it down and restarted it to recovery mode and since then its stuck on Samsung boot logo with 'recovery not seandroid enforcing screen' . I tried to boot into download mode using VOL DOWN + POWER KEY since my HOME BUTTON IS FAULTY AND DOESNT WORK. So, I get to the download mode warning screen, BUT pressing volume up OR volume down does nothing and I have to keep POWER + VOL DOWN pressed for about 10 seconds again to come to download mode warning screen. How can I go to download mode when I cant access the TWRP recovery and also have A NON-WORKING home button .
URGENT HELP NEEDED, PLEASE.

Z2 Tablet not booting after Magisk install

So thanks to Netflix and its implementation of security net I wanted to install Magisk on my Z2.
Im running the stock 6.0 Rom which was just rooted with supersu.
My tab was charged 80+%
I uninstalled SuperSU, went to TWRP and flashed Magisk.
After flashing the screen stayed black. Nothing at all.
Long press power gives me one vibration after 3 seconds but nothing else.
Long press power & vol - gives me the same vibration
Long press power & vol + gives me nothing
Connecting the tab to the computer gives me nothing. No device recognised (no adb, no fastboot)
Connecting the tab to a charger has the LED blinking red.
Long pressing power makes the led turn solid (no blinking)
Power & vol - the same
Power & vol + nothing
Basically I seemed to somehow have turned my tab into a brick oO
I can't even get it to boot to twrp or fastboot
Atm I'm letting it charge just to see if that was an issue (I doubt it)
Otherwise the only thing I can think of is opening it and disconnecting the battery...maybe that will help?
Ok nevermind. I managed to get into flashmode and reflash. tab is now working again!
How did you get it to be recognized and reflash? I flashed mine after rooting and I get similar behavior to what you were getting. It will vibrate once if I press the power button, I can get it to turn the light blue if I hold the up volume and the power button while plugged in. The screen will not turn on at the Emma tool doesn't seem to recognize it.
Same Problem here.
@pseudoheld could you please provide some more info?

[Q] Bootlooped, can't access download or recovery

Hello,
as I wrote in this (now locked) thread, I installed Superior OS and got stuck in bootloop. I get "Galaxy S9+" screen followed by system bootanimation, which repeats itself indefinitely. It doesn't restart by itself, it just boots endlessly.
The problem here is that I can't access recovery or even download mode. I tried to restart (power + volume down) and then quickly press combination to access recovery or download mode. No luck. I couldn't even turn the damn phone off. I just kept restarting.
So I let it drain the battery hoping I could then power the phone on with correct key combination. I tried holding bixby button + volume down while inserting USB. It just started booting up to system with boot animation. I tried holding bixby + volume up, or even power + bixby + volume down. No luck either.
I got correct USB drivers installed, as I flashed the phone with Odin in the past. Odin recognizes phone while it sits on boot animation, but it won't start flashing. ADB or fastboot do not work on bootanimation, as the ROM is freshly installed. I presume it has ADB turned off by default...
I'll be grateful for any ideas and suggestions.
No escape , man. I tried all ( check this rom for galaxy note 9 )
Nice...
I went to service center, they said they can fix it for me. 40 euros for reflash (download mode isn't necessary), 100 euros for complete unbrick. I hope the unbrick isn't necessary and the bootloader is intact. I'll post with update.

Restart Without Power Button

Hi.
How can i Restart without Power button?
Volume Down and Bixby together to download mode and then Volume Down does not boot up the phone, it just goes back, it does not restart.
Any tips? I Fixed my initial issue, but now when the battery discharged and the phone turned off I cannot start it.
Should I flash it again (that is how i fixed my original issue, of not wanting to boot up) Used odin and the lastest firmware files to load and then when it completed it auto restarted.
Is there a quicker way?
Replace the power button assembly...
^^ nah.....
I got it, Volume Down and Bixby, connect charger, brings the download mode, hit Volume Up, connect to PC open Odin, load empty AP ("xxxx.tar") Make sure your phone is connected, start, phone restarts.

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