Have TV Questions? Ask a TV Technician
Hi , I`m Jack , a TV/AUDIO repairman with 40 years experience. Perhaps i can help you with this , let me know when you see this.
I see that you came around to take a look
From your description this would be a t-con board problem and without the model number i can still tell you that you may be looking a a couple hundred dollars to have a shop repair this in average , depending if you take it to them or they come to your home.
If you wish to look into this yourself then let me have the tv`s model number and i`ll find the parts for you.
If you don`t have any more questions for now then please do take the time to rate my answer by clicking on the star icons at the top, then click on Submit , this is how I make a living and that rating gets me paid for my time.Also note that it will not close this post , you can come back here at any time if you have questions or need help.