Agree with Yilb

1st did the ground upgrade as show here
http://www.pinrepair.com/sys3/

2nd check n°24 panel "Q" "T" "A" relays (need them to start) and the common wire number 288 link to them

3rd check any fuses under playfield

Also got a hole on A3 driver board and was repair with wires and works fine.
I've solved lost of problems when I did the ground upgrade. You could not test your pinball if this ground connector got bad connections.

(PS: Those diagrams comes from a Stargate so it could have some differences with your pinball)

Have fun

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Test those 3 switches in test menu then look at mechanical parts in motion under SW34. Better test in game without the apron. Check if SW24 works every time.

Fuse F6 probably burned due to shunt between ground N°9 and N°588
Use Ohmmeter, also test voltage between 20volts diode bridge and test C2 capacitor uFarad (be care to not shunt poles or touch them )
On the Gottlieb electrical schematic you can read that some electronic compts do not works fine over 10 years so I've change all 3 Capa and 3 Diode bridge for few value...
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