12 Apr
2013
12 Apr
'13
2:39 p.m.
On Fri, 12 Apr 2013, David Riley wrote:
The PSU is probably pretty similar to an ATX supply in
that the
motherboard pulls a pin high or low to soft-switch the supply
on and off. I'm having trouble finding a pinout for the 6400's
PSU, but try finding the +5V standby with a meter first. If
that's not present when the thing is plugged in (no fans should
be running), it might be toast.
No familiarity with that particular machine, but did you provide a LOAD
for the power supply? Many supplies can not be tested without a load. A
car headlight works pretty well. A dual filament bulb with one bad
filament is fine for this, and worthless to anybody else.