Konka TV setup

Never heard of that brand but... If it is a new TV return it to the store because it is defective. If you've had the TV for a while and things have changed in the picture quality then there is a component fault and adjustments will not help, and will make it much more difficult to get it back to normal after it is properly repaired.

No, it was a freebie from FreeCycle. And I am a tech, though not for many years. I suspect someone may have altered the set-up since pushing the Picture Reset button on the remote jams the contrast up to max.