There's nothing wrong with the way the power is supplied, but it's likely that the other components that connect to the Nano are the cause of the burn Nano, so it's more likely that you'll get better advice if you show all the connections.
There's nothing wrong with the way the power is supplied, but it's likely that the other components that connect to the Nano are the cause of the burn Nano, so it's more likely that you'll get better advice if you show all the connections.