Motherboard fried???

Please help.
I have an ASrock motherbaord with a intel celuron 2.2gh processor. I was running it with pc133 sd ram, but it also has slots for DDR. I removed the pc133, installed the ddr, and nothing but beeeps. Three beeps, and then silence, and then three more. I removed the ddr, replaced the sd, and now I get no power to my hard drive. processor fan comes on, cdrom lights come on, but no power led from the hard drive. Please help!!!