I have an Asus Eee PC 1215B, whose hard drive I replace about 8 months ago after the previous one died. It had a 250GB SATA 3.0 drive which I cloned to a 500GB SATA 6.0 drive.
After 8 months of operation, the drive disappeared. The BIOS suddenly couldn't see it. I've taken the drive out and hooked it up to another machine and even ran a full self test on it. It seems to be in perfect working order.
After returning the drive to the laptop and making sure it was securely connected, it still exhibited the same behavior. Even more strange, after resetting the bios to factory defaults, it now won't do anything but boot into the bios, and even when I exit the bios it just loops back into it.
I suspect either a failure in the HD controller or more likely that the bios might be corrupt. If the bios is corrupt, does that indicate the bios chip is going bad, or can I maybe save it by flashing it?