Hi, I recently upgraded my processor from a celeron D to a intel core 2 quad q8200. I am certain that my motherboard is a LGA775 socket so the cpu has to work. When I put the cpu in, I got a black screen, no beeps from my computer and no lights on my keyboard.
When I simply assumed *I must have fitted it wrong*. I tried numerous times and no success so far. I decided to put my old processor back in the computer. Logic told me "there must be a fault in the cpu". But when I tried to put my old one back in. I get the same results.
I took the ram out to see if I could get a beep from my computer. Still nothing, this is while the quad core cpu was in.
Well, just because it's socket 775 doesn't necessarily mean that it will work - the older chipsets such as the Intel P965 for example do not support Core 2 CPUs. Other chipsets support Core 2 CPUs, but only the 65nm versions. As for your problem, I'm surprised putting the old CPU didn't work either - you may have bent a few motherboard pins while replacing it. Otherwise I wouldn't really know sorry.