Hear Crackling+Beeping Sound Through Speakers (intermittently frequent)

When my Powerbook is on, I hear this crackling/beeping sound through my sound output (same through headphones as well). It just started acting up a couple days ago and hasn't stopped. It's rather annoying when I am trying to listen to music or even if no sound is coming through at all.
I don't know if you have recognised this, but if you are in a car or near some type of radio and a mobile phone is being used near it, the radio usually emits a little static-beeping sound because of the interference it is receiving from the telephone waves. That's the sound I am getting from my laptop. This has never happened before.
Is this a sound card malfunction that can be fixed by resetting it or removing and reinserting? Is there anything I can do? Maybe run some sound tests, I dunno. How?
Thanks.

Hi, ljosh. If anyone who had seen your post knew exactly what to do, I doubt that they'd be keeping it a secret from you. I don't know what to do about your problem, but I can tell you that there's no sound card in a Powerbook for you to fiddle with: the audio circuitry is all on the main logic board. There's no room in there for a separate sound card.
All I can suggest is that you start up from a bootable CD and see whether the crackling continues when none of the software (including the OS) on your hard drive is in use. If it does, your Powerbook needs a hardware repair.

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    Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
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