If you can get estimates for free, ask around. But here the repair is my guess of 150 base charge then 200ish for boards and you are north of 350USD fast.

While this model at https://www.walmart.com/ip/Sceptre-50-Class-FHD-1080P-LED-TV-X505BV-FSR/631796609 is not 4K, it is 50 inches and today only $180USD.

Since the minimum repair charge is 150 in my town, I doubt you can get this fixed for less than a new TV.