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Tablet bootloader broken! PLEASE HELP!

Hello guys, last week I installed the unofficial port of MM from here http://forum.xda-developers.com/shield-tablet/general/unofficial-update-original-shield-t3281541 and everything was going well until yesterday the screen got frozen. I tried to reboot the tablet but It got frozen in the nvidia boot logo, so I tried to reinstall the ROM through fastboot. This step is when I realized that I cant write sometimes through fastboot. I can go into this mode but sometimes the writing failed until now everytime it fail. This is the error reported on the screen:
writing 'boot' ...
FAILED (remote: (FileWriteFailed)
This is a screen capture of the command window:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
I think that I have broken the bootloader but I cant find the bootloader img for the tablet. Any help will be thanked!

If fastboot is working you still have a working bootloader. You are in fact in the bootloader. I'm not sure why fastboot write would fail. Perhaps the Windows fastboot driver should be reinstalled.
The bootloader is flashed by a "blob" file and is included with restoration images. If the bootloader does get damaged somehow, you can only boot to APX mode and only Nvidia can repair that.

Try do download and use minimal ADB.
Also reinstall the fastboot driver on your PC (deleting tablet from control panel/system/.... and connecting it again and istall again the driver you download from nvidia site or here on XDA)
best thing you can do if fastboot commadn don't work (happen to me) is download a recovery imagere (again nvidia developer site or here on XDA) and use the flashall.bat.
Magic done for me

and u can use it when u have only Apx? .... i cant find driver for it ... i have only black screen alltime

helllo ..! but still the above case wil work for the deactivated shield's..? my sheilds are now in apx mode..
Sent from my SHIELD Tablet using xda premium

If you can only boot APX mode you are stuck. There's no driver for APX mode so you can't do anything with it. Only NVidia can repair it at that point.

I don't know if this may be important but two days before this happened I encrypted the tablet. this may be affect the bootloader? The tablet is still unusable since I can't flash anything thought fastboot starts.

MT7-L09: Phone Unlocked BUT command not allowed when flashing

Hi,
I never saw this problem
My phone is unlocked (since a year more or less) and I can't install TWRP nor CWM. I tried many tutorials such as all the root methods listed on XDA for this smartphone.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Any idea would be really appreciated!
Thanks

There might be a problem with your drivers. You can try uninstalling and reinstalling them. Also, try using fastboot commands manually
Sent from my Mate

unlock again

Thank you. I'd like not to have to relock it as it's already done and rooted. Could you please tell me what drivers to install? I tested many of them (https://i.imgur.com/wBgsezr.png) but it seems I don't have the right ones then.
I'm using Win7 64bits.
Thanks again!

Use adbdriveinstaler and when it's install you can push recovery to add folder and try this command
cd C:/adb
Fastboot flash recovery recovery.img
Change name your twrp or cwm to recovery
Send frome globe

Okay. Here we go
ADB driver installed (https://i.imgur.com/PWrZoHH.png)
Went to flash and... still not allowed.
And in fastboot/rescue mode on my phone it's written PHONE Unlocked.
WTF
BTW, is there any other way to upgrade the phone? Cause every time I go to the software update in the menu i'm told it's up-to-date, but it's not... Android 4.4.2 & EMUI 3.0.
I read about a "local update" but can't find out how to update from the SDcard, I only have OTA.

Bud64 said:
Okay. Here we go
ADB driver installed (https://i.imgur.com/PWrZoHH.png)
Went to flash and... still not allowed.
And in fastboot/rescue mode on my phone it's written PHONE Unlocked.
WTF
BTW, is there any other way to upgrade the phone? Cause every time I go to the software update in the menu i'm told it's up-to-date, but it's not... Android 4.4.2 & EMUI 3.0.
I read about a "local update" but can't find out how to update from the SDcard, I only have OTA.
Click to expand...
Click to collapse
In your screen you have locked bootloader. Unlock againg
Send frome globe

Okay, I sent an email to Huawei, I'll get back in a few days.

somethings wrong with bootloader mode

hi guys, i unlocked my oneplus6 phone after that i used autoroot in toolAllinOne..all good, i instaled magisk apk and tryed to install but it says always failled. But that is not the problem, the problem is now when the phone is opened the program recognize abd device and model but when i go in bootloader it recognize abd device but model not anymore. the drivers i thing are installed well because abd is detected. Anyone know why model is not detected? I cannot install .img file for twrp.
P.S. the phone works well and it have stock software.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
This driver appear just in bootloader mode, when phone is opened it doesnt appear.

solved.

StyL3sX said:
solved.
Click to expand...
Click to collapse
How?
I could not even find my device when i use fastboot devices command in fast boot mode. Because of this i could not flash twrp also.
I installed drivers and connected the phone in all sorts of modes (usb debugged, usb undebugged, fastboot, system on, switch off mode).
When the phone is connected in switch off mode, i could see something like "usb device not found" message in pc. Tried changing desktop. But it's the same result.
I'm unlocked and on stock open beta 4 pie.

StyL3sX said:
hi guys, i unlocked my oneplus6 phone after that i used autoroot in toolAllinOne..all good, i instaled magisk apk and tryed to install but it says always failled. But that is not the problem, the problem is now when the phone is opened the program recognize abd device and model but when i go in bootloader it recognize abd device but model not anymore. the drivers i thing are installed well because abd is detected. Anyone know why model is not detected? I cannot install .img file for twrp.
P.S. the phone works well and it have stock software.
This driver appear just in bootloader mode, when phone is opened it doesnt appear.
Click to expand...
Click to collapse
Please see my post in this thread: https://forum.xda-developers.com/showpost.php?p=77823085&postcount=2

Bootloop Ulefone armor 6

Hello everyone, I have a big problem with my device, it happens that the system started to fail and after that it turned off, when I turned on it stayed in a bootloop and I can only access the fastboot, the question is that my device does not have the OEM and I never did any modifications so it doesn't have recovery either.
So far I have tried to install for fastboot the boot.img and system.img from the original firmware but I get the error "remote: not allowed in locked state" because the bootloader is locked
Any recommendation?

Reflash original Stock ROM by means of ADB Sideload method

jwoegerbauer said:
Reflash original Stock ROM by means of ADB Sideload method
Click to expand...
Click to collapse
but I can't use recovery and it doesn't have TWRP installed either.
The truth is that I am quite new to this subject but it would help me a lot if you guide me through that process.
In addition, the stock rom offered by ulefone is in .tar.gz format

Both Stock Recovery and TWRP aren't needed to perform an ADB Sideload: both mentioned recoveries internally simply make use of this method.
Code:
adb devices
adb reboot sideload
adb sideload <STOCK-ROM-ZIP-FILE>
You at any time can convert a tar.gz archive to a zip archive. GIYF ...

jwoegerbauer said:
Both Stock Recovery and TWRP aren't needed to perform an ADB Sideload: both mentioned recoveries internally simply make use of this method.
Code:
adb devices
adb reboot sideload
adb sideload <STOCK-ROM-ZIP-FILE>
You at any time can convert a tar.gz archive to a zip archive. GIYF ...
Click to expand...
Click to collapse
How about, I was trying to access with ADB, however when I put adb devices, the device does not appear, perhaps because I did not have the USB debugging before the bootloop, I was trying with different commands and nothing happens, but it does appear in the device manager. I'm sure I have the correct drivers because I tried another device with USB debugging enabled and it works fine.
Attached image
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

It should be obvious to you that ADB can't work as expected if USB debug option isn't got enabled on Android.

how can the bootloop be solved if only fastboot is available?
And the manufacturer flashing tool doesn't recognize the phone?
I cannot reflash the phone.

Question Made A Mess - ROG 5 CN Fastboot Loop

Was trying to flash my CN ROM to the WW ROM.
Forgot to turn on USB Debugging in Developer Tools.
Couldn't get it work using HunterTik's guide.
Ran flashall_ATF from windows explorer.
Command prompt flashed on screen then vanished.
Tried running flashall_ATF in an elevated command prompt.
It failed but has apparently wiped the ROM. Device is now stuck in boot loop to fastboot.
Whatever option I choose reboots the device back to fastboot.
Windows can see the device but adb devices returns List of Devices Attached is blank.
How do I recover the phone from here?

Found this thread Rog phone 5 stucked on fastboot
Ran this command: fastboot -v flash all WW_ZS673KS_18.0830.2101.75_M2.13.24.14.1-ASUS_1.1.63_Phone-user.raw
Received these lines of text & now device boots to splash screen, gets stuck there, reboots a few times then sends me back to fastboot.
Still can't access recovery mode
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

Device is now back in a fastboot loop with no access to any options but power off & restart.

Your phone is broken
Buy a new phone and don't try to mess with it next time

Flash back to CN and try again.
or, get a dump of the official firmware, then sent boot / recovery / super over fastboot manually.
[Windows] Asus OTA payload auto extractor
Since nobody is doing it, I thought I'd package it and just put it here to help people This is a packaged version of Vm03's payload dumper make to work with windows without installing python and other stuff I also included a single line script...
forum.xda-developers.com
also, you might want to try 9008 rescue. it seems like whatever you're trying to do wiped / repart the partitions. that's why the BL is confused.
also, if you're on win11, some driver related **** can mess things up causing flashing fail.

yurishouse said:
also, you might want to try 9008 rescue. it seems like whatever you're trying to do wiped / repart the partitions. that's why the BL is confused.
also, if you're on win11, some driver related **** can mess things up causing flashing fail.
Click to expand...
Click to collapse
9008 rescue is the direction I was headed & you're right. Although, on reflection, the partitions were already deleted prior to running the 'fastboot -v flash all xx.raw' command. Not sure how, since that command was the only thing I did which resulted in something happening.