Set TV Backlight to max., give some ticking/kocking at the sides and back of the tv or open up the tv to detect/search for lose cable/connection of the Led backlight.
Otherwise there's defect in the backlight driver/powersupply/board.
I found a thread on slickdeals where a few people have bought the UU02 and found it comes with a Samsung panel based on the number in the service menu:
Hey Im looking for some expert help with my UN40EH5000F TS02. Particularly the USB media player. I am creating video content i want to display on the tv in a loop.
1. The first issue I ran into was the display name info popping up everytime it restarts. I dont think that can be helped, unless anyone knows how to turn that off?
2. audio codec not supported! Comes up no matter how I encode my videos. tried ACC, LPCM, mpeg. the video format that has been working the best is a quicktime mov using H.264 video encoding. Ive tried other formats with diff quality results but all have the audio problem.
3. I notice a color shift in using the usb slot. the color is lighter and washed out a little, black is almost grey. I played the same files on a hdmi media player and the color is accurate, deeper blacks. i played with color and brightness settings and they don't seem to have an effect on anything played over the usb slot.
any suggestions or insight is appreciated!