When I turn on my 4 Million B.C. there’s some humming but that’s about it.
•pressing the left flipper doesn’t activate on the light (lock switch) but if done manually inside the game, it works.
•pressing the start button doesn’t start a game but you can play it by activating the interlock
•If you press the coin door, coin switch, nothing happens but you can credit it up manually inside.
What do I check 1st?
Coin door and cabinet Jones plugs not fully seated on the bottom (insert) board? Or, diagnose & troubleshoot the lock/Anti-Cheat Relay to the left flipper button second switch circuit first. Bypass using alligator clip jumper wires if necessary.
Then troubleshoot the Replay button circuit. Then the Coin Switch(es). The front door slam switch, if a "Normally closed" switch must be bypassed on the Insert board before doing anything else.
If you don't have the wiring diagram, buy it if necessary.
Wanna join the discussion? Please sign in to reply to this topic.
Great to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!
This page was printed from https://pinside.com/pinball/forum/topic/no-power-on-the-4mbc-coin-door-what-do-i-check-1st and we tried optimising it for printing. Some page elements may have been deliberately hidden.
Scan the QR code on the left to jump to the URL this document was printed from.
Marblehead, MA