The only thing it could have fried on the arduino is the power regulator if it was only ever connected to the 5V, Unless there was some other higher voltage pumping into the 5V pin. Try and replace the voltage regulator before you bin it.
The only thing it could have fried on the arduino is the power regulator if it was only ever connected to the 5V, Unless there was some other higher voltage pumping into the 5V pin. Try and replace the voltage regulator before you bin it.