Bunsen said:

First, remove the motherboard battery (if present) and try a double-boot

If it works, you need a new PRAM battery - 1/2AA 3.6V

Click to expand...

Will try that - the PRAM battery was removed by me when I received the machine. I'm trying to find my charged PRAM batteries to try a working one.

I wasn't aware that any of the PPC macs were dependent upon PRAM batteries - though the 8100 was the earliest PPC.