I made the mistake of taking my TV there for a free estimate. They lied to me saying that the TV's power supply was bad and then asked me for $450 to fix it. I declined, and had a Samsung technician examine it. It turns out it was a bad capacitor, not the power supply, a much cheaper fix.
Plus, when I went to pick up my television from TV Tech, half the screws were missing and the back cover was all scratched up. If you value your TV stay away from this place.