BT7 not booting; Bios POST A2

mrieglhofer

i had to restore the system with Macrium reflect due to some configuration issues. I have done this several times.
But this time something went wrong and the BT7 didn't boot.

Symptoms:
Starting the BT7, it stops at the Beelink logo with the POST Code A2, which mean IDE Detection. it seems that the structure of the eMMC is not correct.
I can bypass this stop by pressing the TAB key. After this i get the AMI Logo and the question, "Enter setup with ESC oder DEL".
Pressing ESC or Delete, the system responds "Entering setup" and stalls.  Pressing F7, the system responds "Entering boot menu" and stalls.
I can wait for an hour, it doesn't boot.

Problem:
Since i cannot boot from an external device, i cannot access the eMMC and restore the system. Since the eMMC is not removeable, i cannot repair the content. So it is an expensive brick.

Is there any possibility to enter the BIOS Setup or to boot the device?
If not, i must try to send it to the seller BOLV for repair or exchange the device with a fair fee.