Well, a few capacitors I was awaiting arrived this morning and I quickly soldered them in.

Success so far- I have left the Plus turned on now for over an hour with no issues. Works fine now.

Here is a picture of what I have replaced on the Analog board (in addition to those in the previous picture).

I certainly haven't replaced all the capacitors (C1 included because I haven't got them yet) but this seems enough to get going again.

Away with work now for another four days but on the weekend I will have a go at just replacing those two cracked filter caps and see if it makes a difference.

By the way, they are 240v boards I am playing with.

I was also wondering- can faulty diodes give similar problems? I haven't replaced any but they are probably getting pretty old too.

Oh, and for Loom- I ordered those filter caps locally through Element 14 but they actually came from the UK to me.