I'm sure there are local electronic repair place in your area. Check the phone book for some. Otherwise you can go online and search to see if anyone has the same tv and problem. They may be able to help you.
Yes, any local television repair center can diagnose and repair your television, so long as it isn't as old as 1965. If it is older than that, check the internet.
you will proper service from an authorized service center. most of service centers have plot service. they can easily identify the complaint with your television.