Need Help..... Onkyo TX-SR606 No Sound Output

[jassi]

Hi Every1,
I'm using Onkyo TX-SR606 AVR since 2yrs. without any problem. But 2 days back I'm facing one problem with no sound ouput from any speakes. All features and fuctions are working. Even Tuner also showing tuned band but no sound. I tried even Reset AVR but no use. I checked all setting are fine its showing in TV output and every single fuction is working but only sound is not coming. Please help.... Is it hardware problem or some setting.
Please Reply...

 

[dlkanth]

chk the mute function, jammed keys in remote ot avr..

 

[BlueBoat1]

still no sound