Ok this is a PSU for a Intel Netstructure 470T switch. the 12v Rail coming out of it seems to be ... well not there. I get nothing out of it at all on that rail but the others are fine. No burnt components on the board, doesnt have that fresh fried smell either...
a model number that is not visible in the pics is ADP-75AP
I doubt that just by looking at anything can anyone come up with any theories but I thought I would post it here anyway.
the PSU puts out 3.3v on 6 pins, Ground on 7, and then 1 12v pin. the 12v is only used for running the fans in the switch. I have a 12v wall wart I can use for the LAN I have coming up but I would like to get the PSU working properly again. the 3.3 works fine.
the pics below are full 4MP res pics of the PCB.
http://clegg.procooling.com/psu/PCB-bottom.jpg
http://clegg.procooling.com/psu/PCB-top.jpg