Desperate for an upgrade for my socket 939 system I bought a 4200x2. I have an nforce4 mobo that came out right before they stopped production on the line. I had a 3500 single-core and thought it was a simple swap-&-drop for the x2.
I installed the new cup and the system would not boot up. I got fan activity and nothing else. So I tried the following:
1 - Reinstalled the video card, in case i bumped it
2 - Reinstalled the ram (512mb x 4)
3 - Reinstalled the 3500 .... still would not boot
4 - Removed CMOS battery for several hours... still wouldn't boot
I hope this didn't fry my mobo but it sure seems like it. Any help or suggestions would be greatly appreciated.
Edit: I'm an idiot, I didn't notice that it isn't booting with the 3500 anymore.
Make sure the 4 pin power connector on your motherboard is plugged in. It is possible that you staticed the board and killed it. If you reapplied thermal paste make sure you didn't get any in the socket itself. Check for bent pins on the CPU. Make sure your clear cmos jumper is set in the proper position.