Just an idea: In the case of the gate indicator (a neon bulb): try shining a bright light on it to see if that "fixes" it.
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As for "not counting", I don't know an alternative other than to probe signals to find out where things are failing. Is there a gate signal?
I don't remember if the lowest digit display module is unique, or if it's the same as the 2nd digit. If they're the same, try swapping them with each other.
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Pete
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saipan59 (Pete)