This may be power supply issue, try checking the power socket, and switches not working? bring it to service center

This is due to some short circuit on the power amplifier or pcb drawing high power due to short circuit bring it to service center, you cannot do anything it is internal issue

set powering on but no audio means, power supply to other section ok, but internal branch power supply, digital pcb, power amplifier pcb may be faulty

Please check the HDMI cable connected, check the tv connection on the other side, still picture not coming this may be digital pcb issue

Our Home theater Service center in chennai support various brands.

We support Yamaha Home theater, Denon Home theater,Pioneer Home theater, Yamaha  Amplifiers, Denon Amplifier, Marantz Amplifier Marantz home theater amplifier, 

Our Home theater service center equipped with latest trouble shooting equipments, and we are supported directly by YAMAHA MUSIC INDIA.