Interesting computer problem today. Every indication of a hard drive failure. Replaced hard drive after a quick run to Staples ($189.). Same problem after reloading drive from external drive. Computer expert thinks it must be a motherboard problem. Then he says "Hmm, I've never seen a BIOS problem in 20 years but let's try asking BIOS to heal itself, just for the heck of it."
Instantly repaired. "Holy f-," says he. "This is a first for me: BIOS never fails."