The message 434E5540.2050508@stealthnet.net from James Taylor james.taylor@stealthnet.net contains these words:
Garbage on bios can also be caused by other problems, especially power supply problems, where the system asks the drive what it is, and there is a surge or a drop in power, the return value can get munged - I've had that happen before when drawing a ermm little too much at once...
I run through a UPS, so there shouldn't be a problem on that side, and the PSU is rated at 130 watts, which I'm informed, should be enough.