Updated from 6.12.6 to 6.12.8 last night and my system will not boot in any option (normal, safe mode, gui, etc). This has been a relatively stable server for the last few years.
I have tried different USB ports, different USB drives, backups, fresh USB installs, removing all RAM and trying different sticks (ran a clean memtest a few weeks ago), unplugging everything (GPU, disks, HBA, etc), updating BIOS, downgrading BIOS.
It hangs at various points from initialising the USB devices, verifying bzfirmware checksum, verifying bzimage checksum, creating static nodes in /dev, BERT: hardware error, differences between boot sector and its backup.
The syslog doesnt write to USB and I am not sure how to enable it.
With so many random errors I am leaning towards a motherboard issue but I have no idea.
Any help or direction of what to do to provide more information?