I get a continuous beep when running an old Pentium 200 MMX computer with Windows 95. It doesn't happen until after the computer and OS is up and working. And sometimes it doesn't happen at all. I ...

So I've got an old server has started beeping seemingly at random. The system speaker just emits a steady beep (i.e., no repeating pattern) for 30 seconds to a couple minutes then stops. This is ...