Hi, I just come across this topic.
Does you PC glitch like that without any storage on it ?
Booting a motherboard without disks would lead to BIOS/UEFI menu.
If that's the case, you'll need a new computer, your graphic is dead.
If not, does other OS run without trouble on that machine ?
If the machine is fine, then you could try adding graphics-KERNEL to your onboot.lst