**Hello….. I have the same MSI 990XA GD55 motherboard. I had the BIOS version E7640vN1 and I wanted to update to the latest E7640vN2 and it failed! during the update in Windows everything ended well. but when the computer rebooted I was left with a black screen. The Mobo does not start.
Alfrosende, has that procedure of removing the battery worked for you?**
Be careful with BIOS updates under Windows, they usually cause problems, the best thing is either with a floppy disk drive (new motherboards no longer have it), or with a bootable USB drive, with the program to update the bios and the bios you want to update..