My motherboard is Jetway M2A692-GDG. It has 24 pin power connector. I have connected 20 pin from psu. Processor Amd Athlon 64 X2 dul core processor 3600+ (2 Ghz), Ram 1 GB from transcend, PCI Graphics card of geforce MX 4000..
The problem is when i switch on the computer and while it is still in OS selection mode, If i press any key it shuts down.. If I remove the power cord from the cpu and re-attach and switch on the system it works!!! Sometimes it doesn't work.. It keeps on shutting off and I have to remove the power cable and re-attach it. And then it boots successfully.. No problem.. I taught it might be of defective psu unit and tried another system's psu, but same problem persists. I don't know wats the problem is.. Please anybody guide me..