-=> ROY J. TELLASON wrote to JIM HOLSONBACK <=-

 RJT> 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.

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

Maybe.  If that PS did croak on you,  the timing of its demise seems
like a big coincidence, since I know you've been working around inside
that case, trying to get the system to come to life.

For that little test we're talking about,  maybe best also unplug all
drives, or any fans which may be attached to the PS, just in case one of
those may have somehow shorted itself out.

Sometimes, when a bad board or other component makes a PS refuse to
power up,  the PS can take several minutes to reset itself and start
working again.  I don't know anything about the circuitry which may be
associated with that.

Good luck. - - -  JimH.

... "Bother!" said Pooh, as his system crashed, and wouldn't reboot.
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