Hmm, if those lines aren't just an effect from taking a picture of the OLED, it could have been damaged during re-assembly. The glass screen can be cracked without visible sigs of wear or tear necessarily and that can lead to a distorted display like you are perhaps seeing.
Usually when a screen is cracked or damaged, it'll have a distorted/erring display for a while and then eventually go blank. The hardware on the board will still work, however, and you can use the board as a processor and button board even if the screen is failing. It may be worth a shot to try re-uploading the TV program just in case something initialized incorrectly.
Let me know how it goes!
Cheers,
Réna
