That's not a trivial task, as shown by http://www.theeldergeek.com/replace_motherboard.htm
Hope this helps.
Having a horrible problem.
Upon boot up the first thing that comes up is Bios screen, the the mother board manufacture screen then it all goes black.
Tried a different HDD with boot up disc and had same problem.
This one has me stumped if anyone could shed some light on this I would be very grateful.