Annoying static noise coming from Powerbook

[livingfortoday]

My Powerbook has been making a static-y sound from the back of it at random times. It sometimes won't do it all day, and then it will randomly start, and won't go away for a while. It's actually doing it right now! I've tried putting it to sleep for a few minutes, but it started back up again when i woke it up. There, it just stopped again! It can last from a few minutes to an hour, completely randomly!

This problem started when I had Apple replace the logic board on the Powerbook a few months back, and numerous repairs later, nothing has changed, so I'm hoping someone here has an easy fix!

Thanks.

 

[livingfortoday]

Oh, it's a 1.25Ghz Powerbook G4 Aluminum, btw. Totally stock.

Here's the thread listing the repairs and issues it had if anyone needs more info...
https://forums.macrumors.com/threads/243539/

 

[aaron.lee2006]

My guess is either your processor is ready to die or your power supply is about to go. Have it serviced if it is still undr warranty. It is one strange problem but get it checked out. Could just be some bad wiring to the logic board.

 

[livingfortoday]

Dang it, that's the same thing I'm worried about. It's been through 5 different logic boards, new RAM, new DC in boards, new everything! Apple's gutted and replaced this whole machine numerous times over. I guess I'll have to call them tomorrow again...