Sony India — Cost for faulty board replacement in tv

We bought Sony Bravia TV 2years back.
From Last week, TV is not working for which we raised a complaint. Sony authorized person came and confirmed it is power board issue. When we asked for the quotation to replace the board, they asked us to pay rs 7001 which include board cost + 1800 service charge.
Why do they charge 1800 just to replace the board?
Its been only 2 years and we have already paid Sony for the brand not expecting this kind of issues with them.
It would have been good if they provided the quote keeping the purchase date also in mind.
Kindly save us from this looting by Sony.
Thanks,
Spandana