Problems in Sony home theater model no-DAV DZ-310

Dear sir,
This is to bring to your kind attention that I have owned a sony home theater, model no-DAV DZ-310 &, since 15. may -11 and we r not able to use it for past 2 and half year. After one year, I found a message on the display that was 'push power protector', so I lodged a complain to costumer care and didnt found prompt reply by the service centre. Now I cannot understand what to do, so I request you guide me the right way to get the justice.

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