No, you didn't do anything wrong.
Since its persistent across both ROMS, its not a ROM issue either.
In my opinion, its most probably a problem with port or the board. The port doesn't deliver enough power.
You can try flashing the stock ROM back, it might repair in case something s/w related is corrupted. If it doesn't work after that, then its a h/w glitch for sure.
My friend told me,there was life outside the internet and that I should check it out.
I said "Cool.! Send me the link. !!"