Have a Rapid Fire that the score displays dont work,all of them.so i dont think its the displays that are bad.A while back i made sure all fuses on power supplies and boards were good,so not sure where to go from here.Any help would be appreciated.
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I'm assuming the HV power is in the bottom of the cabinet.What do you mean by BR?
Bridge rectifier.
Check out the troubleshooting stuff over at pinwiki.com, they have some things in the HV section you can look at
I had the same problem with my Black Pyramid, one diode in the hi volt section on the transformer board was bad. I replaced all 4 of the diodes with 1n4007 diodes and works as it should.
http://www.ebay.com/itm/Bally-Black...823?pt=LH_DefaultDomain_0&hash=item4ab86de57f
I see a total of 8 diodes on this board,which ones did you replace?The bigger black ones or the smaller clear looking ones?