Hmm... if there are no beeps, then its either the processor or the Motherboard. If you purchased both at the same store, you might try to play it safe and RMA both of them (thats what I ended up doing). They replaced both of them for me, but In the end i realized that the only reason my computer wasn't working was heat related. Still, try to return them both if possible. The problem you are having can point to either a defective CPU or motherboard. But... i would have to lean more towards the processor...