Won't power up

[modraker]

Just finished putting together the following:
Asus K8N-E Motherboard
AMD Athlon64 3000+ Processor
Kingston #KVR400X64C3A/1G Memory Stick
Western Digital 250gb Caviar Hard Drive
nVidia TNT2 Video Card
Antec 350 Watt Power Supply

The last two items are old, the rest is brand new. When I turn the power on, the cpu fan turns momentarily then quits. My back panel I/O escutcheon wouldn't fit so I left it out. Can this possibly cause some kind of mobo grounding problem? Please don't laugh too hard. I'm grasping at straws here.

[blue60007]

Originally Posted by modraker Can this possibly cause some kind of mobo grounding problem?

Very well could be, try this. You do need the I/O panel in there, use the one that came with the mobo, not the generic one from the case.

[modraker]

Thank you, Blue. My problem with the mobo I/O panel is that it's new and the case is old. When I install it, the mobo sits too high up from the stanchions and when I tighten the screws, the mobo bends.

In any case, it was actually a different problem. I forgot to connect the 12V connector (4-pin) from the power supply to the mobo. This is my first Athlon64 build and I didn't know this was necessary for AMD Athlons.

Thanks again for your input and I'll certainly be looking for a properly fitting I/O panel.