I had a TAF that shorted the GI on a coil. The GI wire simply lay across the coil lug. Over years of very slight vibration, the sharp edge on the lug cut the GI wire coat.

Your approach seems good, but once you zoom in on the component string causing the issue, visually inspect every wire in the zone (could be a broken wire too) or a wire touching a piece of steel.

Good luck!
faz

Agree the DR Who Club thread is filled with info, but it's a mess of overlapping issues.

This tech thread for this tech issue is a GOOD thing

You had a good approach. Disconnect everything hooked up to that fuse. Turn the game on and confirm that the fuse does not blow. Then, slowly and scientifically, change one thing at a time.

Do until fuse blows:
turn off game
add a feature (plug something in)
turn on the game / play the game until the point of failure
assuming the fuse has not blown, continue the loop
end-do

Once you isolate the area with the short IMO the problem will be much easier to find.

faz