The green/black is connected to the left flipper cabinet switch and left flipper coil, not both flippers.
I have removed the timer and also replaced the 5A circuit breaker with a fuse holder and 5A fuse to rule it out as a possible issue. Now when I turn the machine on there is nothing at all.
I am guessing that the wires at the on/off switch will need to be moved around? IN post #3 there is a pic of the layout of the wires at the on/off switch. After removing the timer, there is now blue opposite green/black and 2xbrown opposite nothing. Should the blue and brown wires be opposite each other?