Sony India — irreparable sony bravia LCD (KLV-26T400A)

Address:

Kanpur, Uttar Pradesh

Sir/Madam,
I purchased a sony Bravia LCD 26"(KLV-26T400A) on jan.2009 from Ashwani electronics agencies Kanpur. and In dec.2013 there was some problem regarding vedio display. for the same reason I made a complaint to sony care. and one technician visited and inspected. he told the problem of power supply and it needs to be changed but he was not completely sure. So he have taken with himself mother board and power supply. After some days I followed up the situation .he told me that problem lies with the motherboard. but without any intimation to me he has closed the complain. and again he asked me to launch complain. I did the same and launched the complain. and then I followed him approx.. one month but could not give any feedback to me regarding repair cost and replacement cost of the mother board. then again I talked to two-three times to customer care and no body was answering correctly about the price and assuring me in a air that he will take care. then one day technician called me and told me about the non reparability and obsoleteness of the model. And told about his follow up with head office. after few days he offered me about 25% discount on sony led.
after this discussion I mailed to their service head but after many times of conversation he is rigid for not to repair motherboard and his offer.
My problem is with sony why motherboard may not be repaired. and why should I change the complete motherboard. and if model is obsolete in five years then what is the sony product support. who changes their television in every five year in middle class family.
And he provides replacement offer 25% while local dealers itself provides 15-20% in freash product. it means the worth of my Rs.26000/ is now rs. 1000/