Booting from an XP setup CD still leaves the keyboard unresponsive. Or rather, the PS/2 ports are not working. <BR><BR>You could switch to USB hardware.

It will allow you to connect either a PS/2 keyboard or a USB keyboard in fallback mode to the Expert using an ATMega328P and a bespoke DIN-13 to DB-13 cable.

The 620 does not have any PS/2 ports. This system is running XP SP2. I have reset the BIOS to defaults, and ensured that the USB settings are correct. I've tried all the ports, and the USB mouse ...

If yes, connect a PS/2 keyboard to the PS/2 port. The PS/2 keyboard should work on the Windows Resume Loader screen. If you do not have the PS/2 keyboard, ask your friends if they have it or not.

The PS/2-style port was once about as ubiquitous on PCs as USB connectors are today, and more than a few of us accumulated a fair collection of keyboards and mice that sported the 6-pin mini-DIN plug.

Note: If your keyboard’s OEM is not mentioned above, a simple Google search can navigate to the correct page. Once you have downloaded the correct driver of your choice, extract it if it’s zipped.