Gents,
many thanks for both your help.
I now have the beast up and running.
Re the amp, I looked at the Chassis on the motherboard I pulled out, and found the amp screwed onto the rear of it at the top. I unscrewed it, cleaned it up some and bingo!! I now have it working!!!
Re the PC auto power up, followed the advice, set the BIOS and wooohooo, it powers up when the switch is thrown on the cab!
Many many thanks to both of you for the advice!
I now have some of the fluorescent tubes on order (but in the future may go with fitting a cold cathode running off the PC, as this is cheaper than sourcing them tubes here in the UK).
I will post more pics over the next day or so. I am also posting a vid to my You Tube chanell, and will be sure to give you both a worthy shout on there!!!
When this is done, my next task is to look at the two boards I have (one from this MT Force 2003, the other from a MT Force 2002, and see if I can get them running again).
Cheers.