I followed this guide to get my S20+ rooted: https://forum.xda-developers.com/t/...root-s20-series-and-upgrade-firmware.4079353/
I wanted to return my phone to it's original state so I tried uninstalling Magisk through the app but am now stuck in a bootloop where I can't seem to enter recovery or download mode.
The screen pops up and shows the logo, followed by the bootloader unlocked warning, back to the logo, and then restarts this process.
I can't seem to turn it off either. Have to wait for it to be 0%, but once I connect it to a charger, it automatically turns on again.
Can anyone help me solve this problem?
Recovery mode: volume up button and plug it into PC via cable, press power
Download mode: both volume buttons and plug it into PC via cable, press power
both modes only work if you have a cable connected
Related
Today I installed magisk with the help of this guide https://forum.xda-developers.com/lg-g8/how-to/rooting-g8s-guide-t4044193 . It worked and I had root access. After some hours I restarted my phone and now it's in bootloop. It can't shutdown and it's restarting endlessly (pressing the power button for 20 seconds shut it down but it immediatly restart). I can only enter the hard reset menu (by holding volume down and power button, is there a combination for recovery mode with volume up?)
I know I need a way to enter fastboot mode to reflash the normal boot partition from the original kdz or the entire kdz but I can't. neither adb devices or fastboot devices finds the phone and the phone it's not in recognized by the PC so no COM port assigned. Tried to follow this https://www.mylgphones.com/lg-g8-th...nbrick-restore-lg-g8-thinq-back-to-stock.html
Update: I entered the fastboot mode. I plugged the usb-c cable while clicking the volume down button while the phone was off. Now I will try to flash the boot_a.image from the original kdz file
Flashing the original boot_a.image worked. I will now try to understand why this happened
Hello,
I have a similar problem as iddik who is a senior member of this forum who have posted his query on the 30th of October, 2019..
See below is his post...
I have a problem with my phone : Samsung J6+ (SM-J610FN/DS)
I have crached a flashing Rom with Odin and I'm sure it is because of that my phone can't start by pressing the power button.
Now my phone has the message : An error has occurred while updating the device software. Use the emergency recovery function in the smart switch PC software ...
The thing is that it is rebooting and looping without end every 2 seconds on that green screen with that message ...
Only thing I can do is, with the USB cable connected, when the green screen is up, I can push VOL down + VOL up and I can go in download mode.... Then I can push on VOL up but right after the phone reboot in loop again and again ...
Another thing is that without USB cable connected I can't start the phone.
What can I do ?
First thing, I can't start my phone if it's not connected with the USB cable.
Second thing, when I connect my phone with the USB cable, it starts automatically even if I didn't push the power button and it's looping and blinking and rebooting endlessly.
Also the phone don't seems to know how charging himself when USB cable connected.
Is it a Bricked Samsung phone ?
If it is, how unbrick it ?
When you are in download mode, click on power button and volume down button, After the black screen appears or Samsung logo appears, leave the power button. You will get into Phone main settings. then after that factory reset the phone. Everything will start working again. (This happened to me as well.)
Trying to relock boot loader. Have flashed stock and OEM is live but greyed out. Have tried to get back to bootloader screen as per rooting instructions, hold down both volume up and down buttons, hold down power and plug in USB, just goes into start boot loop not getting past the first powered by android screen.
Can boot into download mode but no options there, tried holding the up volume button but nothing happened, tried both up vol and power, nothing, tried both up and down vol, nothing and of course do power and down vol and reboots phone.
Tried vol down, hold power button and USB cable and boot power up loop again.
Tried ADB but phone is not recognised when connected to computer and in download mode, works with Odin so not sure why not with ADB.
Any idea's on how to get to bootloader screen so I can relock?
So I used twrp to flash the pixel rom on my A505F and it all worked but then I went into the magisk app and it said it needs to update so I pressed update and then it restarted and never went past the warning screen(the one where it says your bootloader is unlocked and press power key to continue).I can only hold both volume keys + power button to restart it and it shows the galaxy a50 logo quickly and goes to the warning screen again. When I put it to charge the charging lightning logo appears and sometimes flashes but it doesn‘t show a precentage. I also can’t acess twrp or download mode or connect my phone to adb but I might be doing something wrong so idk. Please help. I can’t afford to buy a new phone.
Hi everybody, yesterday I was playing with my old Galaxy A50 trying to install a custom rom unsuccessfully.
I repeated the procedure three times installing TWRP and then Havoc OS but every time I tried to reboot from TWRP to OS I was stuck at the warning screen saying that the phone bootloader was unlocked and booting into download mode to reflash TWRP was blocked as it showed "only official binaries can be installed" (yes I installed Samsung disabler but still).
Still I was able to get the phone into download mode and reinstall the stock firmware as it seemed to be the only way to install and boot TWRP.
But at 4th time repeating the process I got frustrated, shut down the computer and left the phone on the warning screen still connected to computer usb cable.
Then I got back and noticed the phone was off as the battery died.
Indeed the battery died, so I put the phone in charging and after it reached 100% I tried to boot into download mode again to reflash stock firmware.
But here's the strange thing, I cannot boot into download mode anymore as pressing vol up+vol down while connecting usb cable, shows the lightning charge logo for 5 secs and then reboots infinitely with the same pattern.
If I force reboot by pressing vol down+power it shows the Samsung logo with the warning below it, then skips to another screen with another warning suggesting to press power button to continue (which does nothing) and after a while reboots to samsung logo.
So it doesn't seem it is bricked, it looks more like a battery controller fault, so I tried to detach the battery flex from the board, hoping it would reset the controller but it's still the same.
Also I tried with the flex detached and still no download mode is possible.
Was the download mode somehow erased? (if it's even possible considering it's the motherboard firmware)
If you need photos, videos or even a call on zoom, Skype, webex I would be glad to show you
same i got the same problem i can't find nothing for this when i press volume up and down and put the otg cable its simply charges but it gets stuck on the logo image there's no way to fix this but the only way is to open the phone,change the emmc and put one from samsung,close the phone flash a custom rom and you are done.
If you can enter recovery, do it. As soon as your phone gets into it, select the power off variant and then try to enter the download mode.
It seems like you did not unlock the bootloader, did you?
The bootloader Is unlocked i can't enter in the recovery because the phone locks on charging logo and its fully charged but when i try without charger It doesn't start.