Total screen white/blue pixelated/snow

I guess this is what your FP3 screen looks like:

Take a look at this thread, it has happened to more people, and usually opening the FP3 and cleaning the contacts (and sometimes you don’t even need to clean them) fixes it.

If you dare to clean them, they would be the ones marked in blue in the following image:

(You have more information on how to clean them in this thread).

Good luck!