UNO R3 - 16U2 fried?

Hey guys,

I just got a UNO R3 from one of my friends, who could not get it to get recognized in the PC. It used to work perfectly before, but suddenly it stopped being detected in the PC and is not getting any response whatsoever.

I have tried :

  • Putting the board into DFU mode but shorting RST and GND of the 16U2, but no response and doesn't go into DFU.
  • Using my own Arduino as an ISP to reload the firmware onto the 16U2, just get avrdude error not in sync

I have tried almost every concievable method to fix it, but the 16U2 is not responding anyhow. Can anyone help me out here?