Arduino Mega 2560
From Leo's Notes
This page was last edited on 8 March 2014, at 05:23.
To get your arduino mega 2560 board into DFU mode...
http://gebloggendings.wordpress.com/category/elektronik/arduino/
You need to short the 2 pins for the mega8u2 and then short the center cap (near where the "reset_en" pad is) on the side facing the power connector with ground.