New to this hobby and picked up a couple of older 80s games , Balley fireball 2 and mati hari. Fireball quit working and blows f 4 fuse in power supply. Suspect driver board and or bad rectifier or shorted coil. Noticed new driver boards are around $ 90 . With labor for a tech anywhere from 60 to 90 hr it seems like you could far exceed that in repairing old boards with all the upgrades recommended. Would it be better to just replace entire boards when need repairing these old type boards or have old ones repaired? Any help would be greatly appreciated .