Sony India — Bravia 55x9300D

Purchased from Hyderabad nitih infotech Pvt limited and installed on 16.4.2017 only. The sound quality is weak and very Poor sound even at volume 75-80. The dealer says that I have selected wrong Tv. The Tv asks for password every time I go to you tube and also disconnects from internet on its own very often. half screen is appearing in blue colour for ten to twenty seconds every time channel is changed sometimes for long time also. Unfortunate that I have invested huge money just believing Sony brand.