On Sun, 17 Jul 2005 21:05:10 GMT, Karl Townsend wrote:
For the third time in six months, the PC running my CNC mill has broke.
First time, the hard disk fried. Second time, CPU cooling fan quit.

This time the computer won't try to boot to any drive. No messages at all
from POST on the monitor. For that matter no text at all. Power supply
cooling fan comes on, CPU cooling fan on, strange sound from a drive (can't
really tell which one). I need an ISA slot, or I'd just buy another box and
be done with it. Any suggestions?

Have you replaced the bios battery? Might be about that age - anything
after 4 or 5 years can be suspect and meets your described symptoms.