Try Bammel TV & Electronics...
located at 14530 Walters Rd off FM 1960 281-444-0287.(Champions area)
Don't know what kind of TV you got but they are Sony authorized repair shop plus other brands. They repaired Camcorder that I use. They are NOT cheap and DO charge a fee to diagnose problems. But, they seem to know what they are doing. If you got a cheap TV, it may be better to just get a new one but if you got a TV worth several thousand, check these guys out.