Since I know the machine I will say replace the fuse with a fast blow to be safe if u can't find the fuse value in the manual and u can buy the fuses from Dick Smith or most electronic stores. Cheap as chips.
When that machine first came into Australia, I had Beaky check every board over and I had him repair a board because I noticed the only problem with the entire machine was that there were 3 or 4 only globes on one column that seemed to be extremely hot compared to every single globe on the machine. Beaky replaced a few parts on the particular board and the issue was fixed in five minutes. The machine then ran faultlessly.
If you contact Beaky he may remember what he did exactly. I am sure he will remember if u remind him of Caveys Congo with the one only half column of globes being extra hot.
I don't think there is a problem now with anything except you probably have to adjust the flipper EOS Switch which caused it to stay energised as u said.
It doesn't hurt to use a fast blow fuse instead of a slow blow, but it does hurt to use a slow blow where a fast blow should be. It's not usually a major issue with fuses if u stick to the proper fuse value etc.
One thing U can do, is unplug all the connectors to the boards and turn the machine on, then connect each connector one by one. If something crashes or blows a fuse then you know the connector or area from the wiring back to the machine which is your problem.
If u want to work out which board was repaired by Beaky, remove each board til u see which one has had a professional repair done to it. Beakys work is perfectionist and the best solder work on the planet. By memory it was a small board up high to the right but that's going from distant memory.
I am xperienced with a lot of repairs etc etc but am not a specialist like a lot on here.
I only chimed in cause I know the machine and know it's history but my help is general at best just to give you the basics which might help. Give Beaky a yell if no one else posts or if u keep blowing fuses.
I am confident that if u adjust the flippers and replace the fuse with the correct one everything shld go back to normal. Reseat all connectors on boards properly and double check they are pushed hard against the boards etc.
Hope it helps.
Can anyone else add anything ?
P.s - Congo is a great machine. Miss it badly. I will buy another Congo. Love everything about this unique machine. Only sold it cause I had too many machines and had no room at all to keep it.
That one is a Japaneese import and was a beauty.