Night Vision Flir H307 Screen discoloration

[Jong]

I have a FLIR H307 that was fine when I put it in my gun safe. I pulled it out after a few months and the screen was discolored on one side as you can see in the picture. However, when I just hooked it up via a video cable to a TV, the discoloration is gone. Does anyone now what's going on?

 

[Jong]

Well this is weird. I've been using energizer rechargeable batteries with this and then changed the batteries out with eneloop batteries and this issue went away.