I've a pretty standard G4 setup on OS9 and 10, but my keyboard 'goes away'. Nothing - no lights, no mouse - OSX or OS9.
Extract the keyboard USB from the back of the box and reconnect and 'bingo', back to work. So far only five or six times with 30mins or so between.
This is a home machine that is not time critical.
I don't get onto DaniWeb very often, but if anyone can tell me if this is a driver issue or something deeper, then at last, I can have a go at doing something technical. Please don't tell me the keyboard needs replacing - where's the fun in that?
(The Macs I administer at work just keep on going with so little upkeep required.)