JIM HOLSONBACK wrote in a message to MATT MC_CARTHY:

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

 MM> The steps are reversed!  First plug in the power cable, then flip the
 MM> switch on, _then_ jumper the green wire.  Some use a 'momentary' jump,
 MM> others have to keep the jumper on.

 MM> I'm pretty sure one of those two indicates a 'fault', but haven't yet
 MM> figured out which.  Then again, one way (or the other) might just be a
 MM> change to accomodate the newer MBs which support the "boot after power
 MM> failure" mode. :-((

 JH> Thanks for pointing that out.  I had also noticed that he had
 JH> reversed the steps which I had suggested, but it didn't ring a bell
 JH> with me that that might cause a problem. (at least with some PS's).

 JH> I got curious about this, and just now tested two ATX PS's from
 JH> different mfgrs.   FWIW, both of those will start up the fan if
 JH> jumper is present when power is applied.  Results may vary with
 JH> other power supplies.  Of course, the general best way to do this
 JH> simple test is the sequence which you and I have suggested.

But in any case,  the "5VSB" (5v standby power?) that's supposed
to be on pin 9 (purple wire?) should be there all the time,  right?  Or at
least all the time that the PS switch is on,  right?

That's not there either.

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