JIM HOLSONBACK wrote in a message to PAUL ROGERS:

 JH> With standard ATX PS pinouts,  one simple check which can be made -
 JH> with mains power attached, and PS power switch (if any) turned on, 
 JH> shorting between ATX power connector pin 14 (green wire, per std) 
 JH> and either of the adjacent black ground wires will cause the PS to 
 JH> wake up, and the fan to start spinning. The whole thing will 'shut
 JH> down' again when that short between those pins is released.  I 
 JH> doubt at that stage that there is a way to do much of any 
 JH> meaningful voltage readings on the other pins, since there is no
 JH> load attached to the PS, and its voltages will not likely be
 JH> stabilized to near what they might be if PS were connected to a MB.

So if I were to take a bit of wire,  and jumper between that green wire and
one of the adjacent black ground wires,  and get absolutely *no* response
when I flip the power switch on (power cord is in and connected),  is it
then safe to assume that I have a problem with the power supply there?     
:-|

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