Hi guys... hope I have the right forum. Ive been through a long and winding road with my PC. The latest is that I finally received/installed a replacement MB. Despite it being the same model, I did notice one tiiiiiny difference (this board has an nForce 2 MCP-T, instead of an MCP like the old one). I fire it up and sure enough, I get a checksum error. The keyboard wont work either, so I cant even enter setup. Heres what shows up... CMOS checksum error - Defaults loaded Press F1 to continue, DEL to enter SETUP 05/12/2004 - nForce2 - IGP - 6A61BF0BC-00 Everything else checks out fine until that point. I tried resetting CMOS jumpers, but I get the same error. Tried two other new batteries, and nada. Anyone have any suggestions? =( Thanks for your time guys.