Some ADB AppleDesign keyboards cannot start up a Power Macintosh G3 (Blue and White) into Open Firmware.

There are some ADB AppleDesign keyboards that do not properly signal the Power Macintosh G3 (Blue and White) to enter Open Firmware during startup. The AppleDesign keyboard has the ADB cable hardwired to the keyboard. The specific keyboards which cause this anomaly are those which have a stepped Caps Lock key and say "AppleDesign" on the underside of the keyboard.

The solution is to use the USB keyboard which came with your computer, or a different ADB keyboard to start up into Open Firmware.