I have just assembled a new PC based on Leadteks K7NCR18D Pro Nforce 2 mboard. I have installed an Athlon XP2700, with copper shim and TT Volcano 7+ heatsink/fan. Memory is Kingmax PC2700 256MB (DDR333).
Upon POST the memory is detected OK as are all drives etc. After a few seconds the video signal shuts off and I get constant short beeps from the speaker. I have re-seated memory, swapped slots etc to no avail. I can still poer off the system with the 4 second hold on Pwr switch so I assume mboard is OK. I also assume CPU is OK as it will begin to post every time and I can sometimes get into BIOS setup...but not for long.
I am thinking it could be one of the following:
Heatsink/Fan not seated properly - I read a note to peel label off of shim but could not see one. One side of the shim was copper the other was silver. Was the silver half the label - should the shim be copper all over? (dum I know).
Memory? Doubt it, got two sticks tried one at a time...same result.
Could be a mboard raiser shorting but it would fail straight away.. I think.
My guess is that I have left the label on the shim and the BIOS is shutting down the CPU before it overheats.