I changed the motherboard on a friends pc because the vga wasnt working, but upon putting the other board in it never powered up, i put the old board back in, and it powered up, then i tried it with the other board and it powered up before i even plugged the power button in, i dont have any details for the motherboards other than the new one is a AMD Athlon 700 i think any help will be greatly appreciated.
Well, AMD Athlon is a CPU, but it soounds like you mean a Skt 700 motehrboard. Product numbers would be helpful, they should be easy to find, on the board itself, on the PCI slots, on the DIMM slots. Once you get sopme more information maybe we can help.