Flashed the BIOS, checked all cables etc. Downloaded the IBM diagnostic CD which is currently running (takes hours?)
Description from IBM site............

"Original description: Intel Coppermine Pentium III 933MHz (256KB), 128MB, 20GB IDE HDD, Desktop (4x4), Intel 810e, WinME"

Does this mean perhaps that it will only run ME

I found the key for the win 98 disk but again this will not fully load. It gets to the stage where you put in the Time Zone, runs the setup for a few more seconds, then reboots again and again.....