Just checked the F2 and F3 fuses on the power supply board which according to the manual should be 1/8 A  250V - the ones in there have 10A stamped on the end and no marking if they are 12 or 240V - unsure if this will make any difference?

Sounds like a major problem to me - if they are meant to be 1/8A and they are 10A then the problem was allowed to cook the board rather than blow the fuse. I forget whether you can substitute 12V with a higher rating for 240V with a lower rating, but even if this was the case 10A is still way too high.

I would still be trying to determine if there is a problem along the line.