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?

It sounds to me like the power supply died, probably the 5V feed. The
fans run on 12V and the disks may make wierd noises with only 12V coming
in. The weird noises might also be the power supply itself. I would swap
the power supply and go from there.

Bob