it seems that a lot of m6 owners (especially the new owners) think of the DFU tools as the ulitmate solution for all problems encountered with their m6.
the m6 freezes?? use DFU tools!
black screen but with clicking sound?? use DFU tools!
green screen?? use DFU tools!
on the contrary, the DFU tools should only be used as a LAST RESORT. when you have already tried every other solution out there (twice, even thrice) and still nothing can make your m6 work. the FAQ and the search function should help you with this.
i repeat
USE THE DFU TOOLS ONLY AS A LAST RESORT, WHEN ALL ELSE FAILS. try ALL other available solutions twice, and even thrice, before using DFU.
if you do end up needing to use the DFU tools, read the instructions through, as many times as you need, before actually performing the procedure. again, FAQ and search are your best friends.
i hope my post will at least make you think twice about using DFU tools at the first sign of trouble. more often than not, reset will solve minor issues.
good luck to all and enjoy your m6!