Quoted from pinballdaveh:check all the backbox and GI bulbs. #44 bulbs should be changed out for # 47 bulbs or led bulbs because they draw less power. check for burned connectors on the fuse rectifier board, usually from 44 bulbs. and check for cracked solder connections on the back of the fuse rectifier board and reflow bad ones
Just to add a little bit, silvered bulbs may still work, but will draw more current. You're better off doing a global replace with new 47s. You could keep 44s in the playfield if you want it a little brighter, but cherry pick and make sure the bulbs LOOK good.
Also, you WILL need to replace the header pins and you WILL need to repin the connectors on the rectifier board in the head. The damage has been done and simply replacing the bulbs will not fix the problem.
Queen Creek, AZ
