After power work the game boots, but in attract and lamp test most controlled lamps do not flash; only a few lamps blink.

Controlled lamps stuck or not flashing: reflow MPU and lamp driver header pins

Cause: Poor contact between the MPU and the lamp driver board: cracked solder on the header pins and chips that are not seated well in their sockets.

Checks

• Confirm the MPU LED flashes its normal count at boot.
• Run lamp test and note which lamps respond.
• Inspect the header pins on the MPU and lamp driver board for cracked or dull solder rings.

Fix

• Reflow the header pins on the lamp driver board and on the MPU.
• Reseat the socketed chips on the MPU.
• Rebuild worn connectors between the boards if they have not been done.

Systems

• Bally MPU AS-2518-35

Games

• KISS

Related tips

• Lamp data and select lines: MPU J1 and lamp driver J4 pins
• Lamp driver board: which SCR drives which connector pin
• Mr. & Mrs. Pac-Man GI flashes in attract but stays off in play
• Controlled lamps flicker or stay out after fitting a replacement lamp driver with LEDs
• AS-2518-14 vs AS-2518-23 lamp driver boards
• Test lamp SCRs with the power off
• Some controlled lamps out: cold solder joint on the lamp driver board connector
• Substitute SCRs for the lamp driver board

Source: Pinball Repair help group!! (Facebook group)