Hi I have a very very annoying problem that's been goin on for a couple of months now, but is now getting worse and worse. There is a very irritating, high pitched chirping noise coming from the rear of my tower case desktop. It sounds like the constant sound of crickets, except maybe higher. I have noticed that it is somehow related to the parellel port, whcih i do not use: If i gently press in on the port, the noise stops. It sometimes stops if I plug a parallel printer cable in (with nothing on the end). Then the noise will reappear, but then disappear if I detach the cable. then reappear, and so on and so on. The nosie seems to be in some ways related to the mounting of the parallel port (I think). I have opened the case and nothing is obviously wrong (although I am no expert). All the external case screws are tight, so I can't see it being rattle or anything. It sounds almost like some poorly connected electronics or something?? Has anyone any ideas what this might be? It's driving me nuts!!!! BTW: Motherboard: ASUS a7n8x-x AMD XP 2.4GHZ 512mb ram 1x60 gb + 1 200GB HD Creative SB 5.1 GeForce 5200 Graphics Generic 4 port firewire card generic Wireless Network card Thanks for any help!!! Jim

Are you sure there are no crickets inside your computer? Lol. I'd open the case. The only thing I can imagine is a fan squealing, or a modem speaker squawking.

Are your filters ON for keyboard? Leon Wisnensky The Hot Dog Vending Pimp

Most noises are from a fan. First tighten the screws on the back of the power supply (near the top rear of case, a few inches above the parallel port). If that does not help, stick a toothpick into the grill of the power supply with the machine off, then turn on the machine. The toothpick will keep the power supply fan blades from spinning and tell you if that fan is the culprit. If that does nothing, take off your case and with the machine running, use your finger or a pencil to halt the blades of each fan and see when the noise goes away. You may have fans on the power supply (sometimes 2), a fan on the cpu, on the motherboard, on the video card, and on the case walls. I bet one of them is the problem. Once you find it post back - replacing them is easy.

An out of balance fan (too much dust) can cause vibrations that rattle loose parts. Small transformers in the power supply and on some boards can develop problems that cause vibrations, but these are normally low frequency. Chirps are normally fan noise.