Charles E. Fox wrote: I just checked the PC Jr. Guide to Operations and it was pretty useless as far as finding the problem. Interesting that you plugged in the keyboards. The usual keyboard has an IR link with the base unit and doesn't need to be plugged in. You might try it with the keyboards not plugged in and see what happens. I have found several keyboards where the battery started to leak and caused a bit of damage in the battery compartment of the keyboard itself. Usual Startup sequence: 1) IBM Color Bar Screen w/ correct memory appears. 2) One Beep from system. 3) IBM Basic Screen Appears Further on in the troubleshooting section it asks if you heard any beeps: No - Have the unit serviced. 1 Beep - Go on with the chart. 2 Beeps - Have the unit serviced.