As soon as a game starts the flasher fuse glows red and blows; fitting a new one just moves the failure to the next fuse up.

Flasher fuse blows the moment a game starts: flasher socket touching a GI socket

Cause: A flasher socket had been bent over until it touched the centre contact of a nearby general illumination bulb socket, shorting the flasher supply.

Checks

• Inspect every flasher socket and its wiring, especially hard-to-reach ones, for sockets bent against other sockets or metal.
• Remove flasher bulbs or unplug groups of flashers at the board to isolate the shorted run; look for a dropped screw in an empty socket or a shorted LED flasher.

Fix

• Bend the socket back into place, insulate it if needed, and fit a fuse of the correct rating.

Systems

• Data East/Sega CPU Version 3b

Games

• Baywatch

Related tips

• Flippers die after being held a few seconds, then recover
• New #89 flashers flash once and blow: replace every dead bulb in the group

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