can you replace the display in a moultrie game cam?

DGS-200 is the model

i sent a I40 back to moultrie and they did it for free.

If Moultrie won't do it for free then there are lots of forums that document how to do it step by step.
Let us know if you need the links for parts and how-to.

I would suppose the lcd is attached to a board using ribbon cables. If you can find a parts donor or a compatible lcd from another model it shouldn't be too hard to do.

Sometimes lcd's in digital cameras quit working too. Usually if it is a black screen it's toast, if it's a white screen it can be fixed. You can take the ribbon cables out of the board, clean them with 90% iso alcohol and reseat them. That may bring it back to life. Just remember to look at the ribbon block (where the ribbon cable attaches to the board), it may have a small latch to lift before pulling the cable out.