So this friend of mine and I were playing with our arduinos and on his way back our 9V connector plugs got exchanged. Now this stupid had connected red to the negative supply of the plug and black to the positive.
We're working on a project, so for testing I used it, I just connected red to +ve and black to -ve of my battery.
So all in all, the polarity got reversed when connected to arduino. Now the power plug isn't working anymore .
I guess must be some diode damage.
Can it be fixed?
I have a mega 2560 R3