Hi all, I have a Lenovo ThinkPad X1 Carbon Gen 7 type 20R1, motherboard model NM-C661 (which is why I believe this is the right thread despite being a Carbon).
The laptop lost power in the middle of a BIOS update and was (presumably) corrupted. Now it does not turn on at all (no display, no fan), with three flashes of the power LED along with an amber charging LED when plugged in.

Model: Lenovo ThinkPad X1 Carbon Gen 7
Type: 20R1-S05A00
Serial: PF-21E8NG
Motherboard: NM-C661

I've attached the dump I was able to take. I was unable to figure out...

Hi all! Here to fix my Lenovo ThinkPad X1 Carbon, hopefully I'll be able to repair it with your help! ♥