I need some help, i was on my computer the other day and it just switched off and won't turn back on. I built my PC and have recently added two extra hard drives with Y conntectors to power them. I have also put a PCI RAID card to connect one of the HD's. So my first assumtion was that the power supply couldnt cope with all the extra devices and just gave in, at the time i was burning a CD so thought this strained the PSU and it just gave up. But there is a light on my MOBO which is still on which makes me believe that the PSU is fine. Cannot really think of anything else unless its something to do with the motherboard.

Please help as this is very frustrating for me....

any help would be much appreciated

Thanks