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My faithful williams is acting up. The electronic reverse unit is intermittent. 3 or 4 times for a direction change , then it could stay in one position. No rhyme or reason.
 

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Is that solenoid or relay controlled?
 

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Take a his-res pic of the board and post. We may be able to pic out the issue. A bad capacitor, cold solder joint, etc
 

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Not the best pic ... I couldn't see anything obvious other than the connectors seem askew. Make sure they are properly seated.
 
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