Video Ghosting and image burn on LG LED 47 inch TV


I had bought this 47 inch LG LED 3D TV around 4 years back and have used it extensively. No complaints regarding it's performance. However from couple of months back I can see ghosting and image impression (logo). As of now it does not affect the watching of the TV but I am sure it will become worse in another 6 month's time. Is there any way to get rid of the ghosting and burning issue. Watched some of the you tube videos regarding this and those solutions have not worked. Is it time to change the TV now?