7-year old Sony flat screen tv. Can it be repaired and if so would it be worth the cost? When the tv is first turned on one half of the screen is dark (no totally but not as bright as it should be) and flickers. After the tv has been on for 30 to 45 minutes the picture is normal and stays that way. Is the tv repairable and would it be worth it, especially considering that it can be replaced with a new 4k smart tv for less than $500.