Hello,
my wife got a S21 FE (SM-G990B/DS VD2). Yesterday it started to reboot over and over out of a sudden, showing the samsung logo first, followed by the knox logo, then shutting off and on again. Tried several guides to enter Recovery or Download Mode. The only thing that worked was entering download mode by pressing Vol up, down and power while a USB-Cable is plugged in, but as soon as i press the vol up button to pass the "warning screen", it shows some phone specs for a couple of seconds, shuts off and starts bootlooping again. After some hours, the phone once entered recovery mode when it lied next to me for about an hour. Tried to wipe cache, but just got an error I can't remember right now. Hoped it fixed itself when it made it to recovery and just rebooted to see if it works again, but then it just keept bootlooping again.
Since then I couldn't figure out why it once booted to recovery on it's own nor why I can't force it to enter recovery by pressing vol up + on.
Still hope it's just a faulty update or bug, but feels very much like it's a hardware related issue. Replacing the phone won't be an issue, but I'd really want to save data on the phone as my wife didn't make any backups and really wants to keep the photos.
As I just found guides that included recovery or DL-Mode, which are both no valid options for my case, I'd be thankful for any ideas to fix the phone or at least gain access to files before replacing it.
So.. did anyone come across similar issues and found a solution to revive the phone or are there any "unpopular" ways to recover samsung phones out of this state?
Edit:
Turned off completely overnight, booted once to system, looped again and now it's working like nothing ever happened. Got no clue what caused it or why it is working again. Saved everything for the case it happens again.
Wouldn't trust that device anymore, but my wife wants to keep it.
¯\_(ツ)_/¯
I would just like to reply here and add my own potential fix and also would like confirmation that it would work.
So I have a SM-G996B in a boot loop which returns a 'fs_mgr_mount_all' error. Possible to reboot into recovery mode, cleared cache and restarted bootloader etc with the same boot loop. Powered off and connected to PC for Download mode for ODIN recovery but upon pressing volume up, it then restarts again so Download mode recovery is impossible.
I know however that Developer options and USB debugging was enabled on the device as well as unlocked boot loader. I was able to download the correct original stock OS based on the PDA , CSC and Android version.
I have then installed the latest ADB software on my PC and Samsung USB drivers.
By then rebooting into recovery mode, I have the option of 'Apply update from ADB'. I have then confirmed the device connects using the ADB devices command.
I would like to clarify one thing however. I want to keep the user data at all costs. By using the stock firmware and renaming as update.zip, will it use the HOME_CSC and not the CSC file? If not would it work if I open the zip and remove the CSC before re-zipping to make sure?
Thanks
Reebee said:
Hello,
my wife got a S21 FE (SM-G990B/DS VD2). Yesterday it started to reboot over and over out of a sudden, showing the samsung logo first, followed by the knox logo, then shutting off and on again. Tried several guides to enter Recovery or Download Mode. The only thing that worked was entering download mode by pressing Vol up, down and power while a USB-Cable is plugged in, but as soon as i press the vol up button to pass the "warning screen", it shows some phone specs for a couple of seconds, shuts off and starts bootlooping again. After some hours, the phone once entered recovery mode when it lied next to me for about an hour. Tried to wipe cache, but just got an error I can't remember right now. Hoped it fixed itself when it made it to recovery and just rebooted to see if it works again, but then it just keept bootlooping again.
Since then I couldn't figure out why it once booted to recovery on it's own nor why I can't force it to enter recovery by pressing vol up + on.
Still hope it's just a faulty update or bug, but feels very much like it's a hardware related issue. Replacing the phone won't be an issue, but I'd really want to save data on the phone as my wife didn't make any backups and really wants to keep the photos.
As I just found guides that included recovery or DL-Mode, which are both no valid options for my case, I'd be thankful for any ideas to fix the phone or at least gain access to files before replacing it.
So.. did anyone come across similar issues and found a solution to revive the phone or are there any "unpopular" ways to recover samsung phones out of this state?
Edit:
Turned off completely overnight, booted once to system, looped again and now it's working like nothing ever happened. Got no clue what caused it or why it is working again. Saved everything for the case it happens again.
Wouldn't trust that device anymore, but my wife wants to keep it.
¯\_(ツ)_/¯
Click to expand...
Click to collapse
Similar issue with same phone. In a bootloop after trying to root. None of the button combinations have worked for me, for the past several days.
Tried powering the phone off for the whole night.
When connected to the PC shows phone is in recovery mode via adb (blank screen though).
Want to know how to get into DL-mode, guaranteed.
Got to DL mode by pressing vol up + down + power + usb cable connected in PC and phone. However, couldn't do anything there, but maybe you can
Also, phone is still working and I still have no clue what was the problem and what fixed it.
Related
Hello, I would like to first tell you the story my LG G4 has gone through and then I tell you the error.
So, at first my phone was working absolutely properly. I accidentally deleted some pictures and to do a recovery, I had to root it. And rooting would be useful for later so why not do it?
So I first unlocked the bootloader through the code from the LG site. After unlocking, the phone reset (because it would be just too good to make some memory changes and nothing more.) But allright. Then I was ready to root. I just booted the phone, everything was fine. I unlocked the developer mode and opened ADB. I rebooted to recovery through
Code:
adb reboot recovery
I was expecting to see some menu with buttons (but that would be just too good). However, I saw just android with a red triangle in the middle. Nothing more. No response to buttons, nothing.
So I thought. Allright, let's boot into recovery using hardware buttons (vol down + power) at startup. Unfortunatelly, it seemed like there is no such mode System just normally booted (and that was just after bootloader unlocking. Recovery mode goodbye.).
I tried to send commands to the phone using diagnostic port. Unfortunately, it responded by FAIL to every command.
I reboot to bootloader and booted an image: "boot-em.img" (from here: google: how-to-root-lg-g4-on-android-6-0-marshmallow-20a20b-firmware. I'm a newbie here. thx for understanding.)
After that the console uploaded the image and booted successfully. Then, however, system started to boot up and was endlessly booting (LG boot animation) till the battery was critical.
I was able to access the EMI number through volume-down button and volume-up button pressed simultaneously.
I was also able to access some factory-reset dialog by holding volume-down and pressing power-button several times. I choosed to reset everything and then accepted it with one more 'are you sure dialog'. System rebooted and was stucked in the LG boot animation.
Then I got to download mode, since recovery mode was lost in hell. Through LG-UP I flashed the original KDZ firmware and everything got back to normal, but recovery mode was still inaccessible through the hardware buttons. I got through the process of setting everything up, getting developer, rebooting to bootloader and I booted TWRP.
TWRP loaded and it responded to double-tap on screen to wake it up. I just checked the menus and let the phone sleep.
After several hours I went back to the phone and double-tapped on display. Nothing. Phone was not responding. I pressed the power button and the phone restarted (I think. It either restarted into the system or was not responding to power button.)
So I got to the system and again rebooted to the TWRP (through fast-boot). I tried to back-up one partition to the disk. During the process phone had turned the display off. So I double tapped. Nothing. I removed the SD card and the phone woke, saying that back-up process was not able to complete. Suddenly it stopped responding to double-tap. It woke up through an interrupt. I re-inserted the card, successfully backed-up the partition to the SD-card and I left the phone laying on the bed plugged in the charger. It stayed that way for 4 hours or so, doing nothing. All of a sudden, a yellow screen was there, (and that's a screen of absolute death that was never supposed to come. Little I knew.) saying that an unexpected critical error happened and to do a memory dump, insert a cable, set up some communication (I don't remember what it was, didn't take a picture of it.) and it could send the memory dump to PC or somewhere. I thought to myself. So, the application is not so stable after all. It said that to reboot just press the power button or something.
And now the problem comes:
The first start: Bootloader booted, LG animation went on and finished. The starting up apps dialog came rolling. Then, system restarted.
The restart: Bootloader booted, LG animation went on and freezed. Then, the phone restarted.
Second restart: The same thing as the first one.
Fourth restart up till now: Bootloader tries to boot and restarts before the LG animation.
I got to download mode and it restarted even there. After re-inserting the batterry I can sometimes get to the Firmware Update window and communicate. There I flashed the official firmware again.
No success, as if I didn't even do it. It restarts before the animation.
Can I do anything with the phone? Hopefully I can. No hardware problem occured (except for a situation where the error could fry the wires inside the mighty System On Chip.)
For the software state I cannot even tell but I might say it's cooked just wrong. That's why I came here.
I know I did some pretty stupid steps. But the error was not done by me. It worked fine and after the yellow screen which came by itself, it just (some bad words).
Thanks for replies.
Phone: LG-G4 H815, European market
Solution
So, I was looking around and believe it or not, this problem disconnected the pins on the motherboard's snapdragon 808.
I think this happened: The device, although it was heated many times during its life, it withstood that so far.
However, a longer run of the TWRP had finished it off. Memory got disconnected while running and it threw a yellow-screen.
Pins got disconnected and from then on it was just a standard common LG bootloop issue.
The continuous process of dying (First it partially loaded, then only animation, then nothing) is explained by this fact that the pins were so-so there and a couple of reboots just got it totaled.
Temporary fix:
Pre-heated the memory chip to 250°C using Hot-Air gun. After 18 seconds at this temperature I pressed the memory on top of the snapdragon down to the board while cooling.
Then I added a little metal square on the metal part that is covering the system on chip. This part is over the SOC where before there was just some tape.
This can work for several days in sleep mode or a couple of 'heat-demanding' operations on the phone.
Permanent solution should be to reball the memory chip on the snapdragon. That's my next step.
T-Mobile S8+ [G955U] -- Factory reset resulted in complete wipe & no longer boots up.
I have a Samsung galaxy S8 plus (T-Mobile) [SM-G955U]
Current Firmware:
G955USQU4CRE9
I'm using windows 7 to attempt to repair my phone.
My problem is as follows...
A few weeks ago my phone started giving me the dreaded:
"Unauthorized actions have been detected..."
error code and sending my phone to restart.
This has happened to me in the past on other phones so i thought, ok. restart and it should be fine. However, this kept happening... the next day and on the 3rd day it happened about 3 times in a row. At this point I was cautious and backed up all my files, turned on USB debugging and shut off my wifi & data.
I then proceeded to do a factory reset from the settings. Once it restarted I got a weird error stating something like no such recovery file could be found. When I saw this I knew I messed up because I didn't first take a backup of my system & recovery...
I got a hold of T-Mobile who walked me through their reset steps, none of which worked. They had me contact Samsung and I did but to no avail. Simply stated they mentioned they could fix it if I had warranty, if not I would have to pay for repair.
Either way I sent all information to Samsung and they have not gotten back to me even though they mentioned we'd hear back in 48 hours. (it's been about a week) I've tried to reach out since then but I haven't had a lot of time to sit on the phone with their elevator music...
Ever since then I've tried everything from Samsung Smart Switch to re-flashing through Odin with no luck.
I've tried all of the reset options...
Hard reset
Soft reset
Wipe cache (recovery mode)
Wipe and factory reset (recovery mode)
Simulated battery pull
etc., etc., etc.
Nothing works. Odin flashes correctly (i get "PASS") and the phone turns off but does not turn back on.
I've tried several tricks to get it to turn back on but it won't go past the boot screen (Samsung Galaxy S8+ screen)
I've flashed, re-flashed, wiped, reset, etc.
Now smartswitch doesn't even work on it because it does not recognize the device...
When i connect my phone now it just shows up as the qualcomm chip. I get "Qualcomm HS-USB QDLoader 9008" under devices...
ADB only works when it's in download mode or recovery mode but it doesn't recognize the device either...
Another problem is the increased time it takes to get into the boot menus (download or recovery).
Sometimes when I haven't touched my phone for a whole day I can get into download mode within 10 seconds or less but the more I try it and especially if I successfully flash stock software, the next time booting into recovery or download mode can take up to 5 minutes (holding the button combination). Recovery mode is worse.. even after 24 hours without touching the phone it will come up maybe in 3 minutes but has taken as long as 7 minutes... my fingers are in pain.
Essentially, even after successfully flashing my phone will not boot. and when i hold vol_down + power i can sometimes get the boot screen but it won't go past that.
Also, None of the above boot options work if my phone isn't connected to power--these options only work when it's plugged in. If my phone is not plugged in it will not vibrate, light up, boot up, or do anything other than behave as a paperweight.
I believed it may have been a charging issue so i left it plugged in overnight and even went to download mode and plugged it in for a few hours but that doesn't affect it at all. Even if i'm in download or recovery mode it'll turn off right when i unplug the device.
I'm trying to get it to the best buy that's approved for samsung repair but when I called they said they wouldn't repair it anyways because i didn't buy it there... -_-
Please let me know if I need to provide any other information. I'm trying to get an image of the recovery screen so you can see the error it gives me... Something about no file found. This is increasingly difficult though because some times it takes too long to get into these modes and I leave it alone and come back to it later.
Has this happened to anyone else? Can someone provide some sort of advice or a method to fix this?
thanks in advance.
Can you download the Qualcomm HS-USB QDLoader 9008 driver, and then see if you can fastboot oem-unlock and see if it unlocks your bootloader
Alright. I've not used this device for a while but now I'm trying to fix it. So far :
1. Device goes on a constant bootloop.
2. I can boot the device if I hold onto the power key. If I let go, it just turns off immediately
3. Can't select anything in bootloader since if I let go of power key (which is to select) it just turns off
4. Tried factory resetting, it's now reset but problem persists
5. When in Download mode, it seems to be able to keep itself on however Odin doesn't seem to detect it. (Windows chimes that a new device is connected (sound only); no warning that device is "malfunctioning", doesn't show up in device manager)
6. Banging the side with the power button also didnt work lol
Extra:
If I put tape on the power button it is able to run perfectly fine. Any ideas?
I'm honestly guessing its a sticky power button. Battery problem is probably not the cause since it's able to hold up normally in Download mode.
Any help is appreciated, really damn confusing. I've never seen a post as such, so if I get this resolved hopefully others can repair theirs aswell.
Bump
Same issue
Exactly the same issue here.
I've even replaced the battery, didn't help.
Did you repair it somehow?
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.
The randomly went into boot loop. I followed this guide suggested by @blackhawk in this thread https://forum.xda-developers.com/t/mystery-stuck-at-boot-screen.4518803/, still no use.
I tried the following things:
1. Connected the device with pc and pressed the volume up and power button to get to recovery mode(no response ).
2. Performed soft reset by pressing volume down and power button(still went back to boot screen).
3. pressed tried to get to recovery mode by pressing power button and volume down after the screen went blank pressed volume up and power button to try get to recovery mode(went back to boot screen).
PS:
The device was working fine until it went into this button in a bizarre fashion.
The device has only play store approved apps.
No attempts were made to unlock bootloader or flash custom rom.
Battery is known to be good right? No rear cover bulging? If any doubt, replace it. A fair amount of power is needed to boot.
Otherwise...
Try to get it to go into safe mode, if that fails...
Factory reset from recovery menu. If that works the data user partition was corrupted likely by a 3rd party app or malware.
If that fails reflashing the rom is the only thing left to try. If that fails it's a hardware failure.
blackhawk said:
Try to get it to go into safe mode, if that fails...
Factory reset from recovery menu. If that works the data user partition was corrupted likely by a 3rd party app or malware.
If that fails reflashing the rom is the only thing left to try. If that fails it's a hardware failure.
Click to expand...
Click to collapse
First of all thanks for the response it really means a lot
The response to the points mentioned:
1. The device looks healthy with no rear cover bulging.
2. I am unable to get to the recovery mode at all, any combination of button I press gets me back to the boot screen.
3. my laptop is not recognizing the device so i am not sure how to go about reflashing the rom.
cheekyrascal said:
First of all thanks for the response it really means a lot
The response to the points mentioned:
1. The device looks healthy with no rear cover bulging.
2. I am unable to get to the recovery mode at all, any combination of button I press gets me back to the boot screen.
3. my laptop is not recognizing the device so i am not sure how to go about reflashing the rom.
Click to expand...
Click to collapse
You're welcome. Sorry to hear of all the trouble you're having.
If you can't access recovery mode ie boot menu you have big problems. Try to do it again plugged into the PC; the newer ones need this to access recovery mode on the Android I think.
Make sure the button sequence and timing are correct. Sometimes I goof it twice in a row
Try removing SD and sim cards. Does charging show on the display? Make sure it's at 70% or more.
Otherwise could it be a failure on one of the buttons? A cable may loose? I don't think a C port failure would cause this but not sure if that's always true. Unless dropped or water damaged mobos rarely fail but this is a possibility.
Maybe someone here has a better plan...