i have DENON X1700 , 7.2 AV receiver , it working fine for the past 1.5 years , now i have an issue that while switch on the receiver , its getting on and after some flickering relay sound its going to stand by mode , can any one tell what would be problem , further if any one help me to get Denon service center contact details in Bangalore . / or good technician to repair denon AV receivers .