What happened? I'm trying to piece together your story...was your sister using the computer when the processor over heated? Did you give all of the parts time to cool down and then try to see if it worked then?

Also, what parts did you change (what parts were replaced, and what did you replace them with)? Did you try to put the original parts back into the computer and see if they still work?


What seems to be happening is that your computer isn't passing the POST (Power On Self Test) test. Is your computer making a series of "beep" sounds when you turn it on? Or do fans spin and nothing else happens? You may want to borrow a "POST0Code Reader" (If you can borrow/use one for free, that would be best) and see if the code it gives tells you why you aren't passing the POST Test. (It'll look something like this)

BTW, usually the display doesn't work if all of the PCI and AGP cards are not inserted all of the way. Sometimes it could be because the RAM isn't supported. And other times it is because of a CPU/processor problem.

One more thing you might try (along with what is mentioned above) is to reset your CMOS. It doesn't usually help, but you might as well try everything. (There should be a jumper somewhere on the board to reset it)