But if only the motherboard is the problem (and assuming I can't fix it), then why get a new processor and RAM? The spare processor is a pentium 4. The actual processor I use in my main computer (the one having issues) is a core 2 duo e6700.
For now though, I have my laptop. Though this is no good as a long term solution for me, and it sucks not being able to use anything on my other computer right now.