I have finally been able to get onto some soldering. I resoldered the yoke joints (if I understand correctly the blue, red, yellow and green wires where they join the power board -outside of board - J1?), went round redoing any flat solders to brighten them up, also the little square transformer joints (LF1?) and it's 4 adjacent electrolytic caps. ( I did that since the first time the fuse blew it was after finger tapping that transformer).

Results? Blew new fuses twice. Where do I go from here? Test the little first transformer in the powerline? How to do that? Take it out? Ohm test it?

I have checked each joint carefully for "bridging", all OK.