Was it the correct fuse (size and slow blow or fast blow) compared to the schematics when u first looked or did you replace the fuse with identical.

I am assuming with game turned off you have reseated all connectors on various boards to get a better/correct contact.

If u open the playfield, can u follow the wiring that that fuse is responsible for as per the schematics and make sure there isn't a loose wire or broken wire or something shorting intermittently.

If you have done all this, then I would be looking at the rear of some of your boards to see if there are any blackened/overheated areas or areas that have been repaired before.

I do these steps and if I can't get an answer or the fault to stop, time for someone else with a multi meter with the schematics who is more patient than I.

I am pretty sure you have the game manual n schematics. Theatre of Magic. Great game.
Drop Beaky a PM. He is amazing at solving this stuff.