HELP MY ARDUINO Wont TURN on and the X505 component or Polyfuse IS warming

HELP MY ARDUINO Wont TURN on and the X505 component or Polyfuse IS warming till its 90 celcius First thing my arduino Wont detected at the PC And the Atmega16u2 is warming My suspection is Atmega16u2 is Shorted and the fuse trigger can anyone help i need it for another project :(

If the 16u2 is getting warm, the board is not repairable. Normal cause of this is abusing the power rails, often by letting more than 5v onto the 5v rail.

Before the 5v Rail Is 8v then i change the regulator to lm7805 Then the bootloader is corrupted then i burn a new one and it works fine I used the USB Not more than 5 volts i measured its 4.95V