be4con

OK, I connected the hotwired psu to a dvd drive, powered up and lo and behold the PSU fan started and the DVD drawer opened. I reconnected the PSB to the mobo, powered up and no fan and no power to the mobo

So I hotwired again and no PSU fan, and 2nd time round no DVD drawer opening either. Tried several different black wires to make sure it wasn't just a faulty hotwire connection but none worked.

Then when I turned off the psu at the switch at the back and disconnected the power cable again but left the hotwire lead in situ the PSU fan started to spin for a few seconds (with no power connected).

So I tried again, and now the PSU appears to work most of the time when I hotwire it and connect it to a DVD drive, but so far never when connected to the mobo. I am right in thinking I should be able to power up the mobo with just the 20 pin and the 4 pin connectors in situ am I?

Sounding more like there may be 2 problems here??