I connected my Arduino Uno to an external power supply, but did not noticed the power supply was on 30V, I saw the part in the picture smoking and immediately pulled the cable out of the arduino. now, each time I connect it to some source of power his "ON and "L" light up ("TX" and "RX" are dark) and the ATmega heats up, and it cant receive sketches from my PC (It says just "Problem uploading to board."). Is my board completely dead or I can somehow save it? please help!

I connected my Arduino Uno to an external power supply, but did not noticed the power supply was on 30 V, I saw the part in the picture smoking and immediately pulled the cable out of the Arduino. now, each time I connect it to some source of power his "ON and "L" light up ("TX" and "RX" are dark) and the ATmega heats up, and it can't receive sketches from my PC. It says just

Problem uploading to board.

Is my board completely dead or I can somehow save it?