Marcus M, PM me. I repair and solder mil-spec parts for the DoD. High reliability soldering certification. I'll do it for free if you're close by or if you want to mail it and of course pay the shipping.
We use PRC 2000's and the NAVSEA 00-25-259 soldering workmanship standards (that's a technical order/manual, same as nasa uses for whatever that's worth). It would help me out to repair it for you because I'm considering buying some evse equipment myself and I wouldn't mind seeing the original workmanship standards/quality of the circuit card/cards before buying myself.
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