New motherboard

Okay, I just installed a new motherboard, processor, power supply and memory. When I press the power switch on the computer, it turns on, and beeps once, and sometimes it even boots on the screen.. but after a few sec it shuts itself down and the HDD led stays on. I can't figure out why it would be doing this. Do you have any suggestions? It is a ECS M800P4-M Motherboard. Thank you.

LDSMous

Do you have an OS installed and have you gone over everything to make sure it's all properly connected ?

Yes, Windows ME is installed on the HDD and the HDD worked in the last computer it was in. I noticed this morning that the BIOS doesn't list the HDD as a bootable drive though. I can only boot to CD or Floppy. I took it to Fry's last night and they switched out the motherboard with another one like it. I might just take all the parts back to the stores, get my money back and buy a new computer.

LDSMous

The little beep you hear is most likely from your bios. You may need to flash the bios. go the the maker of the motherboard and see if there'e an update for your bios. You may also have a bad video card(or not properly installed), If the little light on your monitor goes dim, you not getting anything from you video card.