Dual boot (windows 10/8.1) via two drives. Kept defaulting to sata1 (windows 8.1). Bios had 5 entries for "windows boot manager" that did not identify the drive or sata port. within bios, I used the restore defaults and reboot option.
Now system wont post. I unplugged system and all drives and usb, internal cards... still wont post, nothing on screen, no beeps, or keyboard lights.
After 30 seconds, fans run full speed and sound like vacuum cleaner.
Core i7 with 16 gigs ram and was very stable.