Damaged boot loader on PowerSpec?

[Mrnt]

Initially I was able to flash the firmware using the ff_flash_firmware_tool.py, but at some point during my attempts it seems the boot loader has been damaged slightly.
These are the symptoms:

1. At boot the start screen displays a check id fail message:
   
   but it will continue to start up.
2. I can use the ff_flash_firmware_tool.py to copy firmware to the internal SD card, but the machine will not reboot automatically after copying the firmware. If I reboot the machine manually I see a screen indicating that the firmware is being written from the SD card to the machine:
   
   Then it hangs and I have to turn it off, remove the internal SD card and erase the firmware file (in this case power.bin) and then if I put the SD card back it will boot normally (apart from the error message in (1) above) with the new firmware.

I have tried installing the powerspec_v2.2.20150612.bin firmware file from PowerPrint, but no difference to the symptoms.

Questions:
Does it sound like the bootloader is damaged?
If so, do you have any ideas on how I would reinstall it?

[moonglow]

First of all i recommend you to backup full flash firmware ( LINK ) and you can do anything you want. But i will add such function from Marlin menu to backup firmware bootloader without JTAG.

Does it sound like the bootloader is damaged?

Nope. Their bootloader has a motherboard ID check mechanism ( based on MCU UID ) that value saved just after bootloader location and it is not really good solution because it can be accidentally damaged by bootloader itself by standard update procedure to any firmware ( official or not official )

If so, do you have any ideas on how I would reinstall it?

I will try to add to my Marlin firmware such option or you can dump your bootloader via JTAG and i will patch it to skip such check.