What part of Houston are you in? I'm in West Houston, just east of Katy. Just wondering in case you need a helping hand in person.

Try reseating J101, J102, J114, J210 to see if there is any improvement. As you remove them, can you look for discoloration on the connector housings?

Also, look to see if the pins look dark/tarnished, which is also a sign the pin connection has overheated.

My STTNG looks new too, but 3 years ago, it was resetting just sitting in attract mode. I could play games without it resetting, but randomly during attract mode resets occurred about every hour. I finally had to repin male/female pins on J101, J114, and J210 since they were pretty dark/tarnished. Hadn't had resets since then.

Nice game. In order to keep the MPU board in nice shape, please change out those Duracell alkaline batteries with Lithium batteries.

Also, this connector was mentioned by another person, try reseating it as well. Hopefully, it will also lessen how often the game resets. 2018-02-21 20_18_07-Twilight Zone shutting down - repaired _ Pinside Forum - Internet Explorer (resized).png

I can help you to remove that out of the game if you like. Should be able to take the connections straight to J114 if I recall correctly. It is a useless extra 2 connections that I need to remove out of my game as well. Repinning J101, J114, and J210 resolved my resets in TZ.

I am looking at removing my Z connector completely.

I repaired my resets on all my WPC without having a Kahr board. Just looking to get the Z connector out as this is just extra connections that do not need to be there.

Your original posting makes it sound like the Kahr board is required. Have you even tried your game without the Kahr board since removing your Z connector out of the game?