For months this here Dell PC with five Altec Lansing Speakers has been acting funny. It happens from all PC sources, web, disc, Itunes, whatever. I can hear the little static noises now. Rats. The main problem, aside from the annoying intermittent static rumbling, is that the volume fluctuates wildly. I can be listening to a tune at a moderate volume and, all of the sudden, whamo!… the volume jumps up really loud for a second or two and then in calms back down. Crazy. I’ve tried the basic stuff. Checked the wiring, cleaned the dust from the back of the PC, but I don’t know what’s next. Any suggestions would be greatly appreciated. Thanks.