Bootloader showing just a black screen - Shield Android TV Q&A, Help & Troubleshooting

I have three Shield TV boxes (all stock-rom 2.1) and tried to flash the new Vulkan Update 3.0. I was successful on two of them by doing the follwwing steps:
1. Connected via USB to PC
2. Activated Developer-Mode and then ADB (actually I had that done long time before)
3. Booted into Bootloader using ADB-command
4. Unlocked Bootloader using Fastboot-command (all apps and date wiped out)
5. Reboot (after that had to setup Shield TV and repeat steps 1 and 2)
5. Booted again into Bootloader
6. Flashed TWRP-image using Fastboot-command
7. Reboot
8. Booted again into Bootloader
9. Selected "Boot recovery kernel" (= TWRP)
10. Installed Vulkan 3.0 Update Image via TWRP (Zip-File)
11. Reboot
Done.
It worked perfectly fine on two of my shield TV boxes. But I have problems with the third one: Everytime I enter bootloader I do not have any video. The screen is totally blank (black screen). I can use Fastboot-commands from my PC though (e.g. unlocking Bootloader and flashing TWRP seems to work since the output on the PC tells me so). But since I absolutely do not see anything I cannot enter TWRP and use it for flashing the Vulkan Update 3.0 then. Even more: Not being able to enter (or at least "see" anything in) bootloader and TWRP will make it hard to administrate the box in the future.
I meanwhile tried three different displays - no difference. I also tried factory restore and flashing the older dev-images of 2.1, 2.0 - and even 1.3 and 1.4. I was hoping these images would somehow repair the bootloader (since I suspect it is broken, showing no screen). But they obviouly did not. Bootloader stayed black every time I entered it anyway what firmware I was using. Funny thing is that booting into Android TV itself just works fine all the time. I have the NVidia logo, the start animation and - of course - the Launcher screen with all apps. So I can use the shield box. Just the bootloader seems to show nothing (it is responding to fastboot-commands, but only shows blank screen). Therefore I cannot upgrade to Vulkan 3.0 or do any administrative things that require to "see" the bootloader or TWRP .
Any ideas how to repair it?
Thanks in advance for any help!

Ok, after some trying I was able to boot into stock recovery mode: I connected the Shield TV box via USB with my PC and at the DOS prompt I entered "adb reboot recovery". When I saw the Android-Symbol I pressed the power button on the Shield TV box for 2 seconds and then entered the recovery menu. I then selected ADB sideloading and on my PC I typed "adb sideload name.zip" (whereas "name.zip" was the name of the Vulkan-3.0-Image-ZIP-File). Then flashing went well. Now I am on 3.0 and I can begin setting up all apps again.
However, I once again tried entering the bootloader menu but it still just shows a blank screen. So that is still broken. Does anybody know how I could get the bootloader to display anything again?
Regards,
FantasticN

Something new, strange...
Izsūtīts no manas Nokia 3310 используя бесплатную xda app

You could try flashing the weird box with the factory images ( https://developer.nvidia.com/shield-open-source ), maybe it's somehow on an older bootloader that has a bug, or it's partially corrupted. You don't need to see anything in fastboot to flash the factory images. Heads up, they will wipe your device (unless you remove the -w switch from the batch file that initiates the flashing process).

Related

[Q] Nexus 4 - Stuck in Bootloader, unsuccessful ADB access -

Hi guys,
I had posted a brief thread a couple weeks ago stating that my Nexus 4 restarted by itself, and got stuck in the bootloader animation loop. I couldn't remember whether I had enabled USB debugging in my phone prior to it killing itself (not rooted, completely stock, did the OTA 4.4.3 update just a few days before my phone died, and phone's been out of warranty for quite a while now ).
So I installed the SDK developer tooklit, and followed instructions to set up ADB.
However, everytime I boot my nexus 4 into recovery mode/"safe" mode, I get the following screen ("Screenshot 1" below).
From there, when I boot into recovery mode, I get the following screen ("Screenshot 2").
Every time I connected my phone to my laptop (keep in mind that I cannot start it .. I always plug it in when I'm in "Screenshot 1" mode) and try to used "adb devices", I get the following cmd screen ("CMD ADB Devices" picture below). I've repeated this process and tried plugging the nexus in during various points in different "safe mode" options. Same result: nothing is detected.
So I got frustrated at trying to backup any data from my phone, and just chose the "wipe data/factory reset" option from the nexus recovery mode, and I got this screen ("Screenshot 3"). I've tried this several times, and I keep getting this screen.
So my nexus committed suicide, and I'm totally not sure what to do. I've been trying to learn how to use ADB etc for the past couple of days by scouring through the xda nexus 4 forums, but I'm still very much a n00b. Do you guys have any advice as to what I can do to get my nexus 4 back to a usable state again?
Things I've already tried (in order):
http://forum.xda-developers.com/nexus-4/general/how-to-how-to-flash-factory-image-t2010312
http://forum.xda-developers.com/galaxy-nexus/general/guide-phone-backup-unlock-root-t1420351
I also tried to ADB sideload a stock Nexus 4.4.3 factory image, but it is useless since my device won't even show up in CMD when i enter ADB devices.
However, the problem is that my nexus is never detected in CMD no matter what combination of things I tried, so I can't even do half of the things both of those thread instructions state.
I would greatly appreciate ANY ways to factory reset or flash working firmware on my phone! :highfive:
Edit: I reinstalled Android SDK, and connected my nexus to my laptop after entering fastboot ("safe" mode; volume down + power from phone off state), and I was able to get a slightly better looking CMD window when running ADB Devices command (See "CMD ADB Devices 2" picture). However, same problem as before, where my phone isn't even registering via ADB.
So again, your input would be tremendously appreciated.
If you boot in the bootloader (Volume- and Power) it's normal that you can't use adb. You have to use fastboot in the bootloader.
What is the output of fastboot devices?
Code:
fastboot devices
Have you already tried to flash the factory image or did this fail, too? You have to download the factory image from google, extract it and connect the phone in the bootloader/fastboot mode. Run the flash-all.bat then and it will reflash the stock rom. This will wipe your data, but I guess this shouldn't be a problem for you anymore because you already tried to do a factory reset!
If this worked, boot your phone and if it works fine, I would recommend to relock the bootloader (because it gets unlocked automatically if you flash the factory image and if you don't want to root/modify your phone in any way, your bootloader is usually locked):
Code:
fastboot oem lock
Try it and if there are any other problems or if it doesn't work, just ask again

Recover data from broken screen and digitizer, adb not detecting phone in recovery

I realize there are many other threads on this, bear with me please, I was not able to find a solution that works.
-display is broken, shows light but nothing else
-digitizer is 99%? broken, back and menu buttons work, there is some heptic feedback in upper part of the screen
-phone does not have a lock pattern or password, just swipe to unlock
-voice commands work
-phone was rooted a long time ago, I don't recall the mehod, I think the current OS is likely 4.4 but i'm not sure (is there a way to check)?
-I had a custom recovery on it which i think was CWM, again, not sure how to check this now
-I can install apps via web appstore
-At some point I installed a clockroot app (never worked) it's probably still on the phone
-I don't have OTG, ordered one
-I don't want to order a new digitizer
Here are somethings that kind of work and some that don't
-dr.fone shows a USB debug promt with instructions on how to accept the RSA key. I'm guessing USB debugging mode is on but it's not the same computer
-if I have the device in download mode, it is "sometimes" recognized by dr.fone, just says its in download mode and asks to reboot
-if I have the device in recovery mode (i think), it's not recognized at all, does not even show up in device manager
-when phone is just on, it's recognized by the computer, I can browse and backup files (i need to backup google auth app)
-with phone on, its recognized by windows and adb, adb says the device is not authorized.
-however adb does not recognize it if I boot into recovery
I think my best best to just to push the rsa key to the phone in recovery but I'm stuck because the phone is not recognized. I will try re-installing drivers next but I doubt this will help.
Lastly, I wasn't sure if I really do have CWM installed or its stock recovery. So I tried to flash CWM using Odin, with phone in download mode, recognized by Odin, the flash fails with an auth error, i'm reading that might mean the phone is not rooted which is 100% not the case here, maybe the rootclock app is doing something to it.
Any advice?
I'm starting to recall the rooting process a bit and I'm fairly sure I used safestrap method, as I was on 4.4.2-4 NJ something kitcat at the time. So I may not have CWM installed after all.
little bit of progress to report. I'm fairly certain i have safestrap recovery on this phone. So booting into recovery must have been bringing me to the safestrap screen that needs a screen tap to recovery or continue. If I hit power it reboots, if its only 2 options recovery or continue to normal boot, volume down move me to the other option, + power....now adb detects the phone! in sideload mode, lets see if I can do something with this, fingers crossed.
no luck, sideloading seems useless. How can i get myself into recovery!?
I think if I can push the adb rsa key I would be set to use one of the screen mirroring apps. How can I sideload it in?

Got stuck at end of rooting

Hello all. I have owned my shield for 2 years now and for the first time attempted to root it. I made it to the twrp image and instead of loading the needed option to root it stayed on the nvidia image. I am guessing the twrp is old and there for not 8.0 twrp. At anyrate now ehen I turn on my shield it says I need to relock the boot loader and that I am not protected. My question is how do I fix this or do I need to ? Does anyone know where to find the current twrp and do I need to relock the bootloader and start over or can I finish from here ? Will I screw anything up keeping it unlocked ?
First of all, what experience version are you on?
And the warning that comes up when you turn on your shield is just a warning, because you have unlocked the bootloader.
You don't need to worry about it.
If you root, you wanna leave the bootloader unlocked.
mLgz0rn said:
First of all, what experience version are you on?
And the warning that comes up when you turn on your shield is just a warning, because you have unlocked the bootloader.
You don't need to worry about it.
If you root, you wanna leave the bootloader unlocked.
Click to expand...
Click to collapse
Thank you for responding ....
I am on 8.0 oreo
elderbrain said:
Thank you for responding ....
I am on 8.0 oreo
Click to expand...
Click to collapse
For Oreo there is only an experimental twrp, but you don't really need twrp to root.
You can use this guide for Nvidia Experience 7.2.3, which is Android 8.0 Oreo.
https://forum.xda-developers.com/shield-tv/general/guide-root-nvidia-shield-experience-t3882254
So to be sure, you are on Android 8.0 Oreo (Nvidia Experience 7.2.3) Correct?
And not Android 9.0 Pie (Nvidia Experience 8.0)
correct. I have a nvidia shield running 8.0 oreo. do I start from where I left off or from the start ? At this point no command workd for me and the shield is not detected. I have a brand new usb cord plugged in and all things enabled.....power shell says the commands i cut and pasted from your link are not correct commands and the minimal and fast boot says I have no device detected.....so at this point non of this matters untill I can fix this. whats the best command prompt to get this going ?
elderbrain said:
correct. I have a nvidia shield running 8.0 oreo. do I start from where I left off or from the start ? At this point no command workd for me and the shield is not detected. I have a brand new usb cord plugged in and all things enabled.....power shell says the commands i cut and pasted from your link are not correct commands and the minimal and fast boot says I have no device detected.....so at this point non of this matters untill I can fix this. whats the best command prompt to get this going ?
Click to expand...
Click to collapse
I'm using minimal adb and fastboot https://forum.xda-developers.com/showthread.php?t=2317790
Use the shortcut it makes when installed to open a command prompt.
What version of the shield do you have?
And are you booted into the bootloader?
I have the 16 gb running 8.0 oreo. I have unlocked the bootloader yes. I did every step up to loading the twrp. I used a you tube video by TT Technology. Made it to the last and final step. As of now my shield keeps disconnecting and reconnecting when connected to through usb so it does not detect any devices. I get lucky for a moment but it then stops recognizing the shield. Whats odd is that the shield is listed and I can open it and access all the storage including the mounted through the computer even when the connection drops. Right now untill i fix this issue everything else is moot.
I didn't ask if you unlocked the bootloader.
I'm asking if you are able to get into it where you do the fastboot commands?
Ah sorry. No, no commands work and I am not able to load the bootloader. It says deamon failed to start and it does not see the shield as a connected device.
elderbrain said:
Ah sorry. No, no commands work and I am not able to load the bootloader. It says deamon failed to start and it does not see the shield as a connected device.
Click to expand...
Click to collapse
If you own a SHIELD Controller
Unplug SHIELD TV.
Connect SHIELD controller to SHIELD TV with a USB cable (use port closest to HDMI).
While holding the A and B buttons at the same time, connect power to SHIELD TV.
If you do not own a SHIELD controller
Unplug SHIELD TV.
Connect a USB keyboard directly to SHIELD TV (use port closest to HDMI)
While holding the "A" and "B" keys down at the same time, connect power to SHIELD TV.
Once you enter Fast Boot mode, on the keyboard use the "X" and "Y" keys to navigate the menu and "A" to select
Click to expand...
Click to collapse
This will get you into the bootloader, and you should be able to use fastboot commands
I tried both keyboard and controller and this is not do anything. When I fire up the command prompt two things happen I get this message:
C:\Program Files (x86)\Minimal ADB and Fastboot>adb reboot bootloader
adb server version (40) doesn't match this client (36); killing...
* daemon started successfully *
error: no devices/emulators found.
Or it finds the shield and says its offline. My usb connection has been fixed. I was able to run a game through game stream to my pc and even watched a movie with my computers dvd player on my tv using wiredxd. So I know i have a solid connection. I am clearly doing something wrong here as I clearly am connected to the pc now.
elderbrain said:
I tried both keyboard and controller and this is not do anything. When I fire up the command prompt two things happen I get this message:
C:\Program Files (x86)\Minimal ADB and Fastboot>adb reboot bootloader
adb server version (40) doesn't match this client (36); killing...
* daemon started successfully *
error: no devices/emulators found.
Or it finds the shield and says its offline. My usb connection has been fixed. I was able to run a game through game stream to my pc and even watched a movie with my computers dvd player on my tv using wiredxd. So I know i have a solid connection. I am clearly doing something wrong here as I clearly am connected to the pc now.
Click to expand...
Click to collapse
Oh my bad, I didn't think you were able to boot.
Have you enabled usb debugging on the shield in the developer options?
Anyways, that error is usually because of using an out of date adb.
try this minimal adb and fastboot
https://www.androidfilehost.com/?fid=745425885120698566
Yes. I have made sure all 3 possible options where enabled, from developer options to usb debugging. I even got the message to allow it always on this device. I have full access to the shield through usb and it appears in my DM.........I have tried all three versions I can find for minimal fastboot. v 14.1......1.4.3 and the one you said to try 1.4.2. All have the same message. It just either does not detect a device or it says its offline. I have pretty much thrown in the towel at this point as all options have been attempted and hours of googling where wasted. I really have no idea where to go now. I tried resetting the shield a few times.....then tried revoking usb and re enabling and nothing will get it to connect to the deamon. Thank you for all the help. I appreciate you trying
In what state is your shield currently ? From what I read in your posts , your shield doesn't currently boot ? You said it's stuck at the nvidia logo. I am no expert, but if you really are stucked at the nvidia logo, until you enter fastboot mode properly, ADB won't be of any help. If that's the case , then follow any of the methods in post #10 of this thread to properly enter fastboot mode. From there you'll be able to fix things. Since it was you that unlocked the bootloader then it means that the cable, the drivers and your installation of ADB were all in working order at that moment. Now has to why you are stucked on the nvidia logo , you didn't mention which step of which guide you were following when that happened , but at the very least your recovery.img or boot.img have issues. If it's the recovery (twrp) then you're using a wrong one. I don't think a bad recovery.img will let you get as far as the nvidia logo so I doubt that's the issue here. Your boot.img seems corrupted and cannot proceed past the nvidia logo, so perhaps you tried a pre-patched boot.img that isn't the correct one for your current system version or you patched it yourself with a magisk manager that doesn't properly patch the boot.img . I would suggest that next time you type "fastboot boot boot.img" (boot instead of flash) so that you at least try the boot image before you go on and flash an untested file (not a blame, if its the case then you followed a guide that didn't mention this precaution first). Anyways , if you're stuck at the nvidia logo , then what you should do first is try to flash a clean boot.img . Go to nvidia's site and grab the proper recovery for your system version (7.2.3 you said) by scrolling down to Recovery Images , and first choosing your correct hardware and next the image you need. Extract these files in the same folder as your ADB installation so that you can just click "flash-all.bat" and it will fix your shield (it will flash the correct recovery.img and boot.img). Of course this has to be done while you are in fastboot mode , so it comes back to this, get your device into fastboot mode properly. Any USB keyboard you have around the house should work to do this :
Connect a USB keyboard directly to SHIELD TV (use port closest to HDMI)
While holding the "A" and "B" keys down at the same time, connect power to SHIELD TV. --- I add this : Hold the keys until something happens. Release them only once you reach fastboot mode or the nivida logo and try it with every usb port before ruling it doesn't work.
Once you enter Fast Boot mode, on the keyboard use the "X" and "Y" keys to navigate the menu and "A" to select
Oh, if you get into fastboot mode and the commands still give you errors about client versions not matching, that might be an issue with other software running on your pc, but we'll stay out of this for now.
Roamin64 said:
In what state is your shield currently ? From what I read in your posts , your shield doesn't currently boot ? You said it's stuck at the nvidia logo. I am no expert, but if you really are stucked at the nvidia logo, until you enter fastboot mode properly, ADB won't be of any help. If that's the case , then follow any of the methods in post #10 of this thread to properly enter fastboot mode. From there you'll be able to fix things. Since it was you that unlocked the bootloader then it means that the cable, the drivers and your installation of ADB were all in working order at that moment. Now has to why you are stucked on the nvidia logo , you didn't mention which step of which guide you were following when that happened , but at the very least your recovery.img or boot.img have issues. If it's the recovery (twrp) then you're using a wrong one. I don't think a bad recovery.img will let you get as far as the nvidia logo so I doubt that's the issue here. Your boot.img seems corrupted and cannot proceed past the nvidia logo, so perhaps you tried a pre-patched boot.img that isn't the correct one for your current system version or you patched it yourself with a magisk manager that doesn't properly patch the boot.img . I would suggest that next time you type "fastboot boot boot.img" (boot instead of flash) so that you at least try the boot image before you go on and flash an untested file (not a blame, if its the case then you followed a guide that didn't mention this precaution first). Anyways , if you're stuck at the nvidia logo , then what you should do first is try to flash a clean boot.img . Go to nvidia's site and grab the proper recovery for your system version (7.2.3 you said) by scrolling down to Recovery Images , and first choosing your correct hardware and next the image you need. Extract these files in the same folder as your ADB installation so that you can just click "flash-all.bat" and it will fix your shield (it will flash the correct recovery.img and boot.img). Of course this has to be done while you are in fastboot mode , so it comes back to this, get your device into fastboot mode properly. Any USB keyboard you have around the house should work to do this :
Connect a USB keyboard directly to SHIELD TV (use port closest to HDMI)
While holding the "A" and "B" keys down at the same time, connect power to SHIELD TV. --- I add this : Hold the keys until something happens. Release them only once you reach fastboot mode or the nivida logo and try it with every usb port before ruling it doesn't work.
Once you enter Fast Boot mode, on the keyboard use the "X" and "Y" keys to navigate the menu and "A" to select
Oh, if you get into fastboot mode and the commands still give you errors about client versions not matching, that might be an issue with other software running on your pc, but we'll stay out of this for now.
Click to expand...
Click to collapse
I have all but gave uop at this point, but to answer your question. My shield works and runs it is just in the state where the bootloader is unlocked and I get the warning. I have attempted the instructions before, holding down the a and b keys on both the game controller and a wired keyboard and it does nothing. I agree that the twrp is not current and that I need the proper files. As of now my shield is just not recognized period. That is why holding down the aand b keys does not work ( IE it in the command prompt it says shield is offline or it sees it and when I enter fastboot it just says waiting for device and does nothing more. So half way through it looses connection to the shield ) Untill I can get the shield to be recognized none of these instructions matter. As of now I have decided to give up and maybe in a while try again. I would like to completely restore my shield to the state it was in so I can start from scratch. That is what I am focusing on now, but untill my shield is recognized I dont think even that is possible. Thanks for your post. I appreciate all the help all of you have offered.
Impossible d'accéder au recovery
Bonjour j'ai fait une erreur de flashing, le fimware de NVIDIA Shield TV n'était pas bon, donc le logo NVIDIA reste bloqué, j'ai essayé de faire a et b mais impossible d'accéder au booloader et au recovery comme faire ?

OTG Mouse to get final Essential update - touch screen still won't work

After reading for hours, I was successful to find an OTG micro-USB adapter with male USB-A end which allowed a Logitech dongle to be inserted and the mouse allowed me to start afresh from a factory reset. The touch screen didn't work.
There was an OTA update and I got all excited thinking, "This will be the update that fixes the touch (or lack thereof) issue."
Sadly, after the message said this was the final update, the touch screen still didn't work.
I was successfully able to enable USB Debugging because of the OTG Mouse.
When I connect to the PC and run an ADB command (e.g. adb devices), a message pops up asking to verify I trust the RSA Fingerprint for that computer and to remember that device.
Now my huge predicament: there is no way for me to touch the checkbox and choose OK.
Once I unplug in the cable to connect the OTG Mouse, the dialog box disappears.
I read about TeamViewer on the PC and TeamViewer Host from the Play Store. I installed both and was able to see the Essential Phone on the computer but whenever I touched the screen of the computer (or used the trackpad), nothing happened on the phone.
I tried pressing spacebar thinking that might enable the checkbox but no remote response on the phone.
I'm so close...all I need is one checkbox and one ok and it'll remember the USB Debugging settings.
From there I can then figure how to either downgrade from Android 10 or hopefully some kind soul can let me know what file to install so I can get this stupid touch screen to work.
I explained in a lot of detail as I wanted you folks to know I've tried many options to troubleshoot this problem before asking for help.
If there's a non-USB Debugging checkbox checked way in Fastboot Mode (e.g. ADB Sideload in Recovery), I'm willing to try that.
Thanks.
Update 2020-07-07: I had an idea to connect a SteelSeries Stratus XL wireless gaming controller to the phone via bluetooth and was successfully able to use the controls of the controller to enable the checkbox and remember the RSA Fingerprint for USB Debugging. Whooo-hoo! Now for the rest of the matter...getting this darn touch screen working with an device image that solves the problem....
I had the same problem after flashing the newest (and final) Image on top of a rooted, very old marshmallow build.
I found a fix on reddit however, and hopefully it works for you too.
I tried the second method described there:
1. Connect to fastboot to unlock bootloader and critical
Code:
fastboot flashing unlock
(didn't do anything for me since I was already unlocked)
Code:
fastboot flashing unlock_critical
Let the phone wipe itself and reboot, then go into fastboot again
2. Then flash the image of September 2018 (PH1-Images-PPR1.180905.036) via the "flashall.bat". After a reboot my touchscreen worked again.
3. Upgrade to the newest image or whichever one you like.
I don't understand the whole problem exactly, so maybe you could try flashing the newest image directly after the unlock_critical step, but I just followed the instructions I found.
Good luck!
Thanks for the suggestion and the link for the file.
When I try and run the command
Code:
fastboot flashing unlock
in fastboot mode, I keep getting the message "Waiting for device".
Same thing, when I try and run the flashall.bat file.
I booted in to FastBoot mode, but when I type adb devices in an admin command prompt, it doesn't show any devices listed, even though adb devices does show the phone listed when the phone has booted up normally.
I have:
uninstalled the Essential Phone driver and reinstalled it (multiple times).
installed the 15 Seconds ADB installer and uninstalled it (multiple times).
rebooted the Windows 10 computer multiple times.
IconBoy said:
Thanks for the suggestion and the link for the file.
When I try and run the command
Code:
fastboot flashing unlock
in fastboot mode, I keep getting the message "Waiting for device".
Same thing, when I try and run the flashall.bat file.
I booted in to FastBoot mode, but when I type adb devices in an admin command prompt, it doesn't show any devices listed, even though adb devices does show the phone listed when the phone has booted up normally.
I have:
uninstalled the Essential Phone driver and reinstalled it (multiple times).
installed the 15 Seconds ADB installer and uninstalled it (multiple times).
rebooted the Windows 10 computer multiple times.
Click to expand...
Click to collapse
Make sure to use a proper cable and not the one that comes with the phone for charging.
I use the one from my Nexus 6p. The cable from Essential is only for charging, not data transfer.
I'm using a USB-A TO USB-C cable which shows device in normal boot mode.
I have tried three different cables which all work when using adb devices in normal boot mode.
Still no phone when List of devices attached is shown.
Just for clarity: adb and fastboot are completely different modes. To test if you successfully booted into fastboot and have a working connection, you have to type "fastboot devices". "adb devices" doesn't work here.
But the unlock command should have worked anyway. How did you boot into fastmode? Can you see this fastboot screen?
If not, the easiest way to get to fastboot is to connect the turned off phone to the PC while keeping the volume down button pressed, until you see the screen linked above.
But if you do see the fastboot screen, and still don't get anything from "fastboot devices", I'd try Google's official adb/fastboot tools.
xxera said:
...you have to type "fastboot devices".
Click to expand...
Click to collapse
Yes! I can see the device listed now! I had no idea that you had to type that command! Wow....years later of working with phones and I am still learning. :good: I guess I didn't progress because I mistakenly thought the device was not being found.
I ran both commands fastboot flashing unlock and fastboot flashing unlock_critical successfully.
Once the phone wiped itself and booted up (without progressing from the startup screen prompts), I shut it down then went back in to fastboot mode and successfully ran the flashall.bat command.
I shut it down and restarted it. Touchscreen is still not working. :crying:
When I finally get this working...would I just run the commands fastboot flashing lock and fastboot flashing lock_critical to relock the phone...? I need Google Pay and other banking apps to work so want the phone to be secure.
There is always more to learn
Shame that it didn't work, though :/ Did you flash the image from September 2018 that I linked, or the newest build? If you directly flashed the newest one, maybe try the 2018 build, since that worked for me. Alternatively, from the same reddit post I linked before, someone got it working by flashing the August 2018 build, and sideloading the September 2018 OTA Update after. But I never did this sideloading thing, so can't help much there. All builds and OTAs are available on this neat website by the way.
Regarding relocking, it is generally advised to only relock if you have a good reason to do it. You can only relock a completely unmodified stock image, otherwise your phone won't boot, so no root, magisk or anything.
My banking apps still work on my unlocked and rooted phone, but I'm using a Pixel 3, and not sure about Google Pay.
But yes, if you want to relock, make absolutely sure you're stock, and use the commands you mentioned. Just be aware that this also wipes the phone again.
xxera said:
Shame that it didn't work, though :/ Did you flash the image from September 2018 that I linked
Click to expand...
Click to collapse
Yes, I used the link you gave me for the Sep 2018 build.
I will try the Aug 2018 build and see if I get any joy with that.
Thank you so much for your patience and help!
Just to be clear, you should sideload the September OTA after that, the August build itself won't do much as far as I understood.
Glad to help, I just had the same hunt for clues behind me, I know how frustrating it can be
I tried the Aug 2018 build then sideload flashing the Sep 2018 build. No joy...touchscreen still not working.
The whole fastboot flashing worked except for this one error:
fastboot format userdata
CreateProcess failed: The system cannot find the file specified. (2)
fastboot: error: Cannot generate image for userdata
This message came up once the flash was complete and the phone rebooted itself):
Android Recovery
essential/mata/mata
9/PPR1.180610.091/249
user/release-keys
Use volume up/down and power.
Can't load Android system. Your data may be corrupt. If you continue to get this message, you may need to perform a factory data reset and erase all user data stored on this device.
--------------------------------------------------
Try again
Factory data reset
--------------------------------------------------
There was no choice to Apply update from ADB so I can sideload the Sep 2018 update so I went ahead and chose Factory data reset.
Once it factory reset, I was able to go in to recovery and sideload the Sep 2018 update.
Have I missed anything in this procedure...?
I also tried fastboot flashing the Apr 2019 build but that hasn't helped either.
(Attached is a screenshot of the two files I downloaded. The links are the purple ones I chose). Did I get the correct ones?
The files look right to me.
After some research I found that updating the adb tools worked for some people with that error. The creator of the 15 Seconds ADB installer even edited the post and said the tool is outdated by now. There's a newer version in this post, and maybe you are already using that, but I'd strongly recommend the official ADB from google, since I never had a problem with that one.
Also, I read that you should use a USB-3 cable. The official one from essential itself is USB-2 which can cause some problems in flashing sometimes (which is pretty stupid tbh).
Yes, after you updated ADB/fastboot, I'd just try the Aug image + Sept OTA again. Or directly the Sept image.
Not sure about the factory reset message, I'd say yes again just in case.
Edit: Ah, since it says "can't load android system", I guess the flashing failed.
I managed to fix phones with flashing a second time exactly the same way many times, sometimes fastboot is just moody. But may updating ADB can help here.
I updated fastboot and adb from the Google site.
Reflashed Aug and Sep 2018 files.
No joy. Touchscreen still doesn't respond.
An idea...I tried to install TWRP to see if the touchscreen is actually working but get the error fastboot: error: Couldn't parse partition size '0x' when running the command to install the TWRP Mata recovery image file.
Any way to check if the screen/digitizer is not a hardware fault?
Weird error... Can you post the whole log? If the partition size was read as 0, something went wrong with identifying the partition (if I interpret the error message correctly). Did you correctly flash to boot_a/boot_b depending on which one is active?
But TWRP might not help diagnosing the issue, I think touch stopped working in TWRP for essential phone a while ago, because it is also very outdated...
But to me it sounds like the usual problem after updating that many people had. The screen stopped working after an update, right?
Also, did you make sure to use the new platform-tools fastboot? Google's version doesn't automatically install itself system-wide, so if you just type "fastboot" in the command line, that might still be the old "15 Seconds ABD installer" fastboot. You can type "adb --version"to find out, it tells you in which folder the adb.exe file is.

S6 lite malfunctioned and now does nothing.

History:
I have a samsung tab S6 lite LTE version. The tablet freezed out of nowhere when I was working and restarted but stuck in bootloader. After a while, and after removing the sd card, the tablet functioned properly. The tablet had more 80% of battery charge.
I thought the new update might fix the issue. I installed the update. it restarted and stuck in bootloader again. Power and Volume Down buttons will restart the tab, but it never went past the bootloop.
Left it for 12 hours without charging, and then the tablet went into recovery mode. I wiped the cache and when figuring out the other options in recovery it switched off and did nothing. When connected to a charger, a circle with lighting icon showed up. No combination of buttons worked.
Took it to the service center, and was told the motherboard needs to be replaced. I knew it was a software problem so I came home without replacing the motherboard.
I put the tablet on charge for a while and pressed volume up and down button and connected it to the computer. The tablet went into download mode. I immediately downloaded Odin and stock firmware and tried to flash only the BL file to the tablet. It failed few times, maybe because of faulty cable. I used another working cable and tried to flash the full firmware and the tablet disconnected again from the pc.
But now the tablet showed "an error occured while updating and use smart switch for emergency recovery". Smart switch on pc did not detect the tablet, but Odin did. The device manager detected the device as samsung mobile usb composite device. I used a new usb cable and flashed the stock firmware using Odin. The process was success but the tablet died.
It does nothing when connected to a charger or pc. No display and no buttons worked.
I opened the tablet by removing the display, and disconnected the battery physically. But nothing happened.
I tried several times to connect to pc, and for once it was detected by the pc.
This time I flashed the stock firmware using odin with nand erase and repartition. extracted the pit from csc file and added it to Odin.
The flash was a success but the tablet remains unresponsive. I checked the display to see if I had cracked or damaged it while opening, but it is good.
Now Sometimes, the tablet gets detected by pc as samsung mobile usb composite device and I could even flash the firmware with success. But the tablet displays nothing and is unresponsive.
Can Anybody advice What I can do now?
PS. I used the correct firmware meant for s6 lite LTE version every time I flashed.
Disconnect devices from PC USB port & uninstall official Samsung USB drivers. Reboot & re-install drivers. Connect to another USB port preferably at the rear PC.
Flashed latest Android 10 instead of the latest Android 11 stock firmware (AP *super.img.tar file ONLY) using Odin (I used official Odin3_v3.14.4) with Auto-Reboot, Nand Erase and Re-Partition. Input *.pit file. Flashing process might take 'years' but be patient until it ended & auto boot up successfully. Try another USB port if it failed. Therafter, flash the rest of stock WITHOUT Nand Erase & ONLY Re-Partition, Auto Reboot & F. Reset Time.
Once it successfully got flashed & auto reboot, wait patiently as it might also take a longer time than normal to boot up. Charge the device to optimal. Done!
Optional (Remove Knox Guard)
Connect to the internet. Login to your Google & Samsung account to update everything & reboot upon further updates. Thereafter, boot to Download Mode & flashed AP (Magisk Patched *boot.img, blank *vbmeta.img & patched *vbmeta_samsung.img) + BL (Blank *vbmeta.img) WITHOUT Nand Erase & Re-Partition. After successful boot up, reboot back to Download Mode & ensure there's no 'KG State' on the list before deleting('root delete' not ADB) Knox Guard or app named Payment Service as in Android 10.
Thanks. I will try.
7GHz said:
Disconnect devices from PC USB port & uninstall official Samsung USB drivers. Reboot & re-install drivers. Connect to another USB port preferably at the rear PC.
Flashed latest Android 10 instead of the latest Android 11 stock firmware (AP *super.img.tar file ONLY) using Odin (I used official Odin3_v3.14.4) with Auto-Reboot, Nand Erase and Re-Partition. Input *.pit file. Flashing process might take 'years' but be patient until it ended & auto boot up successfully. Try another USB port if it failed. Therafter, flash the rest of stock WITHOUT Nand Erase & ONLY Re-Partition, Auto Reboot & F. Reset Time.
Once it successfully got flashed & auto reboot, wait patiently as it might also take a longer time than normal to boot up. Charge the device to optimal. Done!
Optional (Remove Knox Guard)
Connect to the internet. Login to your Google & Samsung account to update everything & reboot upon further updates. Thereafter, boot to Download Mode & flashed AP (Magisk Patched *boot.img, blank *vbmeta.img & patched *vbmeta_samsung.img) + BL (Blank *vbmeta.img) WITHOUT Nand Erase & Re-Partition. After successful boot up, reboot back to Download Mode & ensure there's no 'KG State' on the list before deleting('root delete' not ADB) Knox Guard or app named Payment Service as in Android 10.
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Click to collapse
By chance is it going to work for KG:Locked status device? I'm on F62, i bought this (second hand) few days ago from another city. Tapping on build number doesn't give any response, When i try to flash any firmware I'm getting response "All binaries are not allowed to be flashed" I'm pretty much confused what's happening here
Rolith Rtw said:
By chance is it going to work for KG:Locked status device? I'm on F62, i bought this (second hand) few days ago from another city. Tapping on build number doesn't give any response, When i try to flash any firmware I'm getting response "All binaries are not allowed to be flashed" I'm pretty much confused what's happening here
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Click to collapse
Did you solved it?

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