Allowing the sound hangs computer?

Hi, I have a problem with my MacBook A1181.

When you turn over long periods of non-use of the computer is working fine, but the use of any hour of the radiator and plug the computer is run music or just something that emits a sound and hear the speakers crackle and the computer starts to hang all your work, even nebeina do anything. There are cases that you run some kind of a sound that is very strong at all, computer crashes and emits a blue table. Or it stuck listening to music, and it manages to sound off everything works fine again. I believe that something here is connected to the motherboard and the heating time, the sound starts to shorten, which proposes that the radiator and the speaker connectors. What can I do, maybe who have had similar trouble?