Murray has a Sony XBR 930D 4K TV, and it has horizontal lines across the bottom of the screen. Then it looks like it has a double image after awhile. Leo says it sounds like a hardware failure. Scott says that it sounds like LCDs are stuck open, or that the edge backlighting on the 930 are running a muck. Bottom line, it's broken. He may be able to have it repaired under warranty since it's under 2 years old. But if not, it'll likely cost more to fix it than buying a new TV.
Heidi got an old TV set for free, but she can't see the screen very well. Leo says that's probably because the LED backlight has died, and it would probably cost as much to fix as to just buy a new one. She could go into the settings and play with the monitor settings, as it could be just an adjustment. TVs are largely disposable now, though.
Bill calls in to say that if she needs to repair the TV, he recommends ARC TV in Burbank. They repair TVs of all ages.