I thought a few of you might like my idea for testing my Bally lamp driver board.
Elektra uses crappy 555 sockets and was a pain for testing so I made this up it plugs into J1, J2 & J3 then the power lead clips to the wire on the backbox lamps.
Put it in test mode and following the chart I made as to which connector it's one and easily identify which transistor is shot. Took me about 5 minutes check every transistor on the board.