[nota]

after turkey day bump in hope of ?

anybody know a trick to turn on a power supply out of the computer
so I can test the power levels withOUT risk to the M/B or other bits
and see if it really doesNOT out put 5v at all
and to check out the PC P/S before hooking it up to the imac

does apple really use one ground pin for all volts 3.3 5 and 12 v pin #1 on my power supply
and no negative 3.3v or 5v at all ?

what would happen if I used a PC p/s to feed 3.3 5 and 12v on the apple imac
as I have several from older PC's so a no cost test if it will not damage the imac
how to wire the separate grounds on the PC p/s to the apple imac ?

is a PC start switch the same as the imac ''power button'' ? the front push button not the a/c switch on the actual p/s box
will the imac signal start a PC P/S ? or is apple different just to be apple different ?
is the 3.3v line apple calls signal send a code or just voltage back to the power supple at start button push ?