The game boots and the supply voltages are good, but the general illumination, controlled lamps and solenoids are all dead, in any game the driver board is fitted to.

WPC driver board: lamps, GI and coils all dead, CPU fine: broken blanking trace

Cause: The blanking/enable signal that lets the driver board outputs work was not reaching its logic chips: a fine trace from the J113 ribbon connector to the first chip had broken underneath the F115 fuse holder.

Checks

• With a logic probe, check the enable/blanking line from the CPU ribbon (J113) at the driver board logic chips; if it never changes, follow the trace back toward J113.
• Look closely under and around the F115 fuse holder for a cracked trace.

Fix

• Remove the F115 holder if needed and repair the broken trace with a jumper wire, then refit the holder.

Systems

• WPC Dot Matrix
• WPC Fliptronics
• WPC Alpha-Numeric

Related tips

• No coils, lamps, GI or flashers but display and sound work: check blanking
• Where the WPC coil and lamp drivers sit
• How a WPC coil, flasher or lamp driver chain works
• Supercharger diverter dead even in test: open TIP102 at Q81 that tested good
• Which transistor drives which WPC solenoid and lamp circuits
• Testing a coil diode on the driver board
• 20-second test for shorted coil driver transistors
• WPC power driver board versions and where they fit

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