Loveland, CO
Perform a factory reset and that will make those error codes disappear.
I recently had a very similar issue and the reset cleared everything up, at the expense of losing your high score history and custom settings.
(Topic ID: 326461)
Linked Games
Twilight Zone
Bally, 1993
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Quoted from ramegoom:Perform a factory reset and that will make those error codes disappear.
I was under the impression that installing the new MPU already did a factory reset. Either way, the machine did do a full reset already. I will try it anyway while waiting for the new opto board...
Opto board replaced successfully. Had a couple 'check switch messages' - 26, 62 & 63. Performed factory reset and all error messages vanished. Game plays beautifully again. A Christmas miracle.
One caveat -- after second game, restarted machine and good old switch 26, trough proximity error came back. This error had been showing up since the early days of me having the game, and persisted for 6 months of hard play without affecting game play. All functions seem normal, but I've got a little concern about that switch 26, since it's on the blue-white line... wondering if it might contribute to another opto board failure if not remedied.
The good news is the OP is getting familiar enough with the inner workings to be thinking about upgrading to a color display.
Thanks Pinside!
Quoted from OptoBoy:Opto board replaced successfully. Had a couple 'check switch messages' - 26, 62 & 63. Performed factory reset and all error messages vanished. Game plays beautifully again. A Christmas miracle.
One caveat -- after second game, restarted machine and good old switch 26, trough proximity error came back. This error had been showing up since the early days of me having the game, and persisted for 6 months of hard play without affecting game play. All functions seem normal, but I've got a little concern about that switch 26, since it's on the blue-white line... wondering if it might contribute to another opto board failure if not remedied.
The good news is the OP is getting familiar enough with the inner workings to be thinking about upgrading to a color display.
Thanks Pinside!
Trough proximity switch does effect play if not working. It’s job is to detect metal balls so in a situation where a power ball is ejected from the trough, if 26 is not working properly, it will not detect the power ball and that mode won’t be triggered. It’s easy to get to, it’s the sensor with a red led near the front of the ball trough it’s got a small 2 pin connector for it
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