remove your batterys and put them back in,sometimes that fixes it.
TAKE YOUR SD CARD AND PUSH IT IN AND OUT until it starts working.some cards do not work good in these cameras.sometimes i have to push sd card in /out 6 times for screen to work.

moultrie says certain sd cards dont work well .i use kingston card and it does not work all time.most of problems are the SD cards.
they do have problem with the glass screen goes fuzzy and its hard to read over time.

all cameras have problems.........chasingame has great info on all cameras.......