can anyone please let me know where to find a good repair shop for AV Recievers in delhi/NCR. i have got sound mute problam in thomson AV reciever. it just plays good for 30 seconds then mutes for 1 sec . and again dame is repeated. i got it repaired once in delhi and 3 months back and problam solved but in 2 months it came back again. funny thing is the service guy just gives warrenty of repair for one month only and doesnt tell what he repaired in the system. he took only 20 minutes to repair it. now again it is just lying on the table with floor stands. please help me out guys.