Sony India — model no. klv-40nx520, red light blinking for 6 times

Address:

Khordha, Odisha, 751003

Dear sir,
Before a few days one auto updation of the software appeared on my tv screen (I have videocon d2h connection). After two days in a fine afternoon while my tv was on, suddenly it was shut down. While switching on every time the sony symbol once comes on the screen then it is off and the red light is blinking for six times repeatedly.
I had lodged a complain through my dealer and one service engineer came yester evening who seeing the blinking, diagnosed the trouble in the pannel board of the tv and gave an estimate of around rs. 21, 000/- only.
My question is that does the symptom of six times red blinking implies a trouble in the pannel board? Can it be judged without opening the tv? Can the pannel board is not repairable? If reparable, what would be the minimum cost? Without touching the tv your service engineer had charged rs. 240/- from me without providing any bill or reference of his visit. Even no message came from sony company!!!