GZ 1500X will no longer charge

Was working fine until ... it wasn't. Tried 3 different chargers (all work fine on another 3000X I have. When I plug them into the 1500X - nothing happens. Can't check whether my GZ panels will work as it is raining here. Was able to start it charging via USB-C port for a short period. Now, not even that work. Tried the reset trick with the reset button under the hood but that did not have an effect. Any ideas? This was a refurbished unit I bought directly from GZ about a year ago. Thanks.

Don

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