Motherboard/CPU Problem

[amjedm]

I have a motherboard from a Dell PC and have been trying to use Intel (dual core) S775 4500 CPU (my first Intel CPU) and I can't remember the exact name

The problem is as soon as I attach a heatsink the motherboard won't post.

If I leave the heatsink on top without attaching it posts. Currently on test bench.

I don't want to waste too much time as I've had enough

Have tried at least a couple of different heatsinks. Any advice?

Thank you.

[Splash]

I can only think that the pressure of the HSF is causing a short somewhere.

[amjedm]

I can only think that the pressure of the HSF is causing a short somewhere.

- that means faulty motherboard?

[Splash]

if you have the board mounted on a testbench and you can be 100% certain that there are no shorts on the mountings, then I'm guessing on either a dried joint or a crack in the board, either way I'd say that the board is more likely to be the problem.

[Georgio1990]

i got a similar problem:S ever since upgrading my cpu to an i5 today my pc keeps restarting every 2-3 seconds :S and im wondering if its a shortning somewhere :S

[superlattice09]

When you put the heatsink on, did you plug the fan as well? Try not to, see how it goes. (a bit of try and error method ;p)

[amjedm]

When you put the heatsink on, did you plug the fan as well? Try not to, see how it goes. (a bit of try and error method ;p)

Will have to get the dust off the kit and try again