[CaptnJohn]

Ok electrical brains, I'm stumped

2019 3761Fl Plugged into 20amp in storage. Only res refer on

ran fine for months then GFI popped
Replaced GFI still popping
replaced adaptors still popping
ran to completely different circuit, different bldg still popping
all fuses are good
no circuit breakers tripped, all turned off and back on

Where to start inside? Anyone have this in the past, I cannot recall reading of it.