I have a PC that every once in a while will emit a prolonged squeal. I have been unable to determine exactly where it is coming from. I temporarily disconnected the PC speaker to determine whether that was it, but the squealing still occurs. There is no sound card or modem in the system, so I cannot determine what might be causing the problem. The system works fine otherwise, so it doesn’t seem to be indicating a problem. Any help would be greatly appreciated.
Thanks.
