Treat it like a failed LED board. Last one working, first one after it that is messed up is the problem. Very rare, but could be the last working one not passing data cleanly.

LTG : )

I am no expert with WOZ light board issues, but I recommend either searching the WOZ thread for light issues or you can search the whole forum for them. There are a lot people who have had issues and posted tips for troubleshooting them.

Or you can google WOZ light board issues and find results like the one I have posted below:

Download the WOZ manual http://support.jerseyjackpinball.com...1_Jul_2013.pdf
* Go to section C, page 50 where you will see the data cable wiring diagram
* Find the LAST WORKING board in the chain
* Bypass it by jumpering the board before it to the board after it ie if board 22 is working but board 23 is not (and all boards after it), connect board 21 to board 23 meaning you have bypassed board 22 (the cables are easy to disconnect once you make sure that you press the lug on it till you hear a click)
* All lights (except the one you bypassed) should now work.
* you need to go into the diagnostic menu, settings and disable the bypassed board

You may also find that jiggling the wire on the last working board fixes the issue but this will most likely be a temporary fix as the actual problem is most likely a bad solder joint on 2 of the legs of the LED driver chip on the board. This was my problem anyway & I know of someone else who had the same issue

This should help you :

Please check out page C-54 in the manual ( you can download it at jerseyjackpinball.com ) that page shows the data harness path. From W6 to #29, to #1, to #2, to #3, etc. etc.

Please go into Tests - LEDs - All LEDs, this turns any working all white. Lift playfield and lean on backbox. You can see the working ones kind of glow.

They are wired in series, a straight line. Find the last working one, the one after it that is out is the bad one. With the power on, you can by pass the data harnesses on the LED boards, bypass the bad one, and turn off in settings. ( be sure and turn it back on when you replace it ) this will help you identify a bad one.

As an example, say #15 was out. You can run the data harness from red on W2, to green on #16 instead of #15. If the rest light up, you know #15 is the bad one.

With the power on you can move data harnesses. They go red to green from board to board. Don't mess with the power connectors with the power on.

LTG : )

Bad LED board. Not switch ?

You can move data harnesses around with power on, good thing you turned game off to mess with power connector - purple and black wires. No idea where you came up with messing with power cable.

LTG : )

It’s nice to hear that you were able to solve the issue so quickly. Enjoy playing again.

Get a WoZ 2.0 light upgrade kit ordered from JJP while they're still discounted to help people get moved over. This will not be the last time you have 1.xx light board issues. It's a bad design and they will all eventually fail prematurely.

It's really not that hard to install, just time-consuming, but you can do it over a weekend in 2-3 hour chunks. Instructions are very detailed, and it will make your lighting rock-solid for the future and improve resale value down the road.

I thought the new RR’s came with the 2.0 lights. Am I wrong? How does one confirm the version of lights?

I think the transition started sometime after the RR run started, so not all have 2.0. If LTG recommended upgrading, pretty sure that means he has 1.xx.

Look under the playfield. Data harnesses running from board to board. Tiny connectors with red or green paint on them - old system. Or blue ethernet cables all over, and a B.A.G. board and HUB board hanging down under there - 2.0

Or check the manual. Download from jerseyjackpinball.com - Support - Downloads - Wizard Of Oz. Page C-54 for old system, page E-24 for 2.0 system.

LTG : )

Thank you for the references. Funny but my RR is different than what’s shown in the manual dated 2016. It appears that the hub board has been incorporated into the W1 board. Would be nice if they would update the manual to reflect this change along with any other changes they might have made to the more recent models.

LTG is nothing less than an awesome professional and person, we're so lucky to have him!

Glad your game is back in action - you selected one of the best pins ever made!