I bought a Navio2 pack a couple of weeks ago. Tested it and all worked fine.
Now I resoldered the power module to the board and it doesn’t work anymore.
I thought the power module was broken but I measured it and it still provides 5(.4) Volts.
From a mathematical point of view, this should not make any difference, because the outer left is always connected to the outer right and the inner left is always connected to the inner right.
But yes, I tried to put the cable the other way around. Same effect.
I don’t understand this argument. Acording to the pinout the only question which is left if Navio2 has a protection against wrong polarity. Otherwise you might have fried some components.