If you have a display hooked up to the Unitiserve then you should be able to see what stage it has got to. This is sounding more and more like hard disc failure to me.
Presumably you can go into the BIOS and using the Naim defaults, just change the boot location to CD-ROM?
And in case he has any ideas, seeing as this Unitiserve is heading for the dump as you are so far from Salisbury, maybe it’s worth seeing whether @NeilS has any other advice to offer.
Most of the story is in another thread Neil -