Rapid Fire
Bally, 1982Game lights up but won't boot
Blows F3 Fuse Power Module which is a 4 Amp and appears to be for the Playfield Lighting ?
I don't typically work on the older SS games so I'm trying to avoid hours of guess work if someone can point me in the right direction to start troubleshooting would be awesome !
7CE2017F-C73C-4FEA-BAEB-68171C76D133 (resized).jpegfuse F3 is for the supply to your 5V regulator.
next to the fuse holders are 4 large diodes, CR5, 6 7 & 8 can you test these? My guess is one or more is shorted.
if in doubt replace them all with 6A ones, the original ones are 3A.
The 5v snakes it's way all over the playfield as it supplies the voltage for all the opto boards. I spent weeks working on a Rapid Fire in the company lunchroom. It would blow the 5v fuse within hours of changing it. I finally found where it was pinched under the front apron. Of course by then the game was toast and management was ready to pull the plug. 
If the fuse is blowing right away try unplugging the playfield. if the fuse still blows as Rikoshay says, check the 12v rectifier diodes. If unplugging the PF stops the fuse blowing trace the 5v wire, i think its orange, everywhere it goes looking for contact with metal.
assuming you mean new rectifier board? Got a pic?
with game off, unplug connector J3 on rectifier board, replace blown fuse with new one, turn game on and see if fuse blows.
if not then problem is likely to be on solenoid driver board, possibly internally shorted 5V regulator?
if it blows then it's on the rectifier board.
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Fredericksburg, VA