Firmware Request for Vestel 17MB180e on Toshiba 43UF3D53DB with Fire OS 7.6.8.1 Boot Loop or unlock

Hello,
I have an issue with the following and looking for some help.
Firmware for Vestel 17MB180e from Toshiba 43uf3d53db
The TV is stuck in a boot loop with FireTV logo. I can enter bootloader OK but many errors in the logs relating to e:libfs_mgr Warning: unknown flag ...
If anyone had a firmware I could try and boot from? I called Toshiba and they can't help because of the Amazon software Fire OS 7.6.8.1. Failing that, I noticed that I notice that it may be possible to unlock the bootloader by shorting a pin on the KLM8G1GETF eMMC and maybe load firmware from here if anyone has experience of this?

AI: Have you already tried any factory reset or USB recovery methods, or attempted to load any official update files via the bootloader? If so, what was the result?
I don't have access to official update files to attempt recovery.
AI: What tools or equipment do you have available for flashing firmware or accessing the eMMC (e.g., USB programmer, UART, JTAG, or just a USB stick)?
USB and possible access to eMMC

I got this from the manufacturer.
https://files.fm/u/acbn7agges

I am trying to update the firmware using the update from USB from the recovery, but it's not installing. I have extracted the bin file MstarUpgrade.bin and placed on root of USB and left the zip file on also to try.
I did see an E:footer is wrong error.
I wonder if eMMC SD is failing? Any ideas. Thank you

Added after 1 [hours] 7 [minutes]:

>>21782088

I am also getting :
update package verification took 0.0 s (result 1)

E:signature verification failed
E:error:21

The file has a problem

Tell us what code the panel has and maybe we can find equivalent software.

The panel code looks like this

Ah, right. I am not sure I have seen that. Can't get a look until tomorrow now, as left TV at work.
I'll disassemble tomorrow and have a good look.


Thanks again.

Good morning.