Pinball Repair - Grand Lizard Switch Matrix (Williams 1986)

Troubleshooting and repair of switch matrix issues on a 1986 Williams Grand Lizard pinball machine.

[@rayrobichaud8588]

Excellent troubleshooting video. Very clear, to the point, and easy to follow. Thank you!

[@craigrose6249]

Finally a video using schematics with detailed explanation Would like to see more like this Well done

[@kolefabian6264]

You prolly dont care at all but does someone know of a trick to get back into an Instagram account..? I somehow forgot my password. I love any tricks you can give me.

[@judahalberto7797]

@Kole Fabian Instablaster ;)

[@kolefabian6264]

@Judah Alberto I really appreciate your reply. I found the site on google and Im trying it out now. Looks like it's gonna take quite some time so I will reply here later when my account password hopefully is recovered.

[@erictaitard9053]

Hi. You saved me ! I bought the grand lizard 2 month ago and the background music never worked. It was the connector installed backward ! Thank you very much for this really helpful video !

[@robertfrancoeur207]

Great video. Will be helpful, I wish. Just bought a Grand Lizard today with issues on switch 22 and switch 44 (this message appears on the board). Also, all the flippers died after our 4th game . any idea? thanks anyway!

[@stanshinko7657]

We have a problem with left flipper failure on a Williams Earthshaker machine. We are following your video and learning much, but we are not very experienced with electronics to this much detail. Machine diagnostics tell us a problem with switch 58. With this information, can we infer that it is not a problem with the flipper solenoid? At a loss as to our next move....... we're in NE Pa. Any comments or help would be appreciated.

[@erictaitard9053]

Can you tell what is the reference for the NVRAM ?

[@SwedishEmpire1700]

Havent you posted this video before? im sure i commented on this video...

[@WarpZoneArcade]

Yes you did, and thanks for the comment. I did another edit and re-uploaded. This will be the final version.