Sony India — Kdl-50w800d

I have purchased sony tv for Rs 76, 000 with model KDL 50W800D on the date 31.10.2016 because of good brand name in market. Last ten days back when I switched the TV on it was blinking with red light five times. No picture no sound.
I have raised the complaints to customer care on 11.11.2020 and I got the call from techician whom demanded for Rs 300 service charge for visiting house and when I agreed for it, he just came to my house and said that the problem is with panel board which will cost upto Rs.33, 000.

After that I tried to chat with sony executives they are telling me to follow the trouble shoot steps which is of no use.

My complaint number is 63848608.

What is the use of buying such costly brands from sony as there is no service response and bad quality of panel boards.