Not Debian but I thought I would share an experience with a Pogo Plug power connector. This is for E02, V3 but not Mobile or V4, i.e. for plugs with a 120 V cord connected to the box.
One of my V3s would not boot and the power connector felt loose when inserting the cord. So I opened the case to investigate and found one of the pins of the cord connector had a loose solder connection; the pin moved when the connector was "wiggled". Re-soldered both pins and all is fine. I should have taken pictures but it's straightforward if you have opened a Pogo to get to the serial connector.
Lesson learned is to minimize use of the connector on the Pogo; use the other end of the cord or a switched power strip if you have to unplug often.
One of my V3s would not boot and the power connector felt loose when inserting the cord. So I opened the case to investigate and found one of the pins of the cord connector had a loose solder connection; the pin moved when the connector was "wiggled". Re-soldered both pins and all is fine. I should have taken pictures but it's straightforward if you have opened a Pogo to get to the serial connector.
Lesson learned is to minimize use of the connector on the Pogo; use the other end of the cord or a switched power strip if you have to unplug often.