new pc doesnt start

[sooshee]

hi everyone, i just bought some components and built a new system. its made of a MSI P7N Platinum mobo, a Intel E8400 cpu, a Gygabyte GT8800 videocard and 2x1gb kingston ddr2 800 memory.

i connected only the cpu, only one memory stick on dimm1 slot (tried both sticks, same result) and the video card (tried 2 different pci-e ports, same result). i connected both the 24pin and 4pin power connectors inside the mobo. the video card is powered by two different power cables, not two connectors from the same cable (tried that variant too, same result). and i connected the power switch button so that i can power the pc and the internal speaker. so i have minimal conections just to see if it starts. when i power up, all i get is one beep, then the MSI logo screen that says "press tab to post or del to enter bios" (no other text appears on screen), at which point everything freezes and my keyboard doesnt respond anymore, although before the msi logo it does (i test this by pressing caps lock). i dont have any other pc or componets to test so i was wondering if this sounds familiar to anyone. what could be wrong with my pc? what component is more likely to be flawed?

[flanzig1]

Would list the brand/model and watts rating for the PSU. Would also check to make sure ALL 4 locking pins for the CPU heatsink are fully latched. If one isn't fully latched, the heatsink won't make full contact with the CPU which can cause overheating of the CPU which can cause lock ups or shutdowns.

[sooshee]

i have a Delux 450w power supply, kind of a noname. i'm sure the heatsink is not the problem, a few seconds is not enough time for the cpu to overheat.

[chuck4456]

Originally Posted by sooshee a few seconds is not enough time for the cpu to overheat.

BS.
A few seconds is plenty of time for a CPU to overheat.
What he said.
And tell us more about your PSU.