Does the game over, balls to play match lights work? These are on a 10A fuse. Want to make sure the transformer winding for the lamps is working.
If so then it's likely one of the sockets is shorted internally or to something else. You can test continuity from the lamp buss braid to other components. If there is some there's a short. Look at the lamp sockets above the lanes. They are awfully close to the gi buss.
Do you have a breaker to test with? https://pinside.com/pinball/market/shops/1041-third-coast-pinball/00475-resettable-fuse