Verify the PC PowerSupply
Dan,
Motherboards often have LEDs to indicate the voltages are OK. Check your manual for details...
Even though you are likely underpowered with 280W, the system should definitely boot, especially with your non-critical hardware (load) removed.
If no LEDs are available, get a (VDC) meter and measure the supply terminals under load and no load conditions.
org = 3.3v
red = 5v
yel = 12v
blk = gnd
ref url re: computing power requirements...
http://www.pcworld.com/howto/article...85,pg,2,00.asp
Good Luck..
P2E