I have a sony vaio I'm working on with a weird problem. When the computer is on, there is a popping noise like a metronome coming from the right speaker. I took it apart so that the only things connected are the cpu one stick of ram and the speakers and the problem is still happened. I even hooked up speakers from other laptops and they have the same noise. I guess the motherboard is bad somehow but my question is what is wrong with it? Is this a capacitor or something? Any insight would be appreciated.