[H] POST issue

[Thane Sherrington]

I'm working a AM5100 tower that was incredibly dirty.  I cleaned it, 
but the CPU heatsink was so dirty I had to replace it.  After 
replacing, the damn machine won't POST.  It POSTs as far as 
6.1  (could be b.1) on my POST card.  I've swapped out RAM and CPU 
(both of which test fine on another board).  Any ideas short of 
replacing the board?

T