Here are a few steps to help fix a distorted or stretched image on your Smart TV:

1. Ensure all your connections and cables are firmly connected.
2. Check the picture settings in the ' Picture menu ' and try to reset the picture.
3. Switch the TV’s video input mode, or calibrated picture settings, to make sure the current video input being used is compatible with the signal and resolution being supplied.
4. Check the aspect ratio settings in the ‘Picture menu’. If this is set incorrectly, a distorted image may appear.
5. Try reducing the resolution of the signal being supplied.