I'm not too familiar with the integrated you have, but here's a few things you may want to check.
Make sure you are not in mute or standby if it has those features.
Make sure you are selecting the right input.
If it has a remote, make sure the buttons are not sticking.
Open it up and have a look inside. Make sure the fuses are ok and none of the wiring loose is or disconnected.
Make sure you are not in mute or standby if it has those features.
Make sure you are selecting the right input.
If it has a remote, make sure the buttons are not sticking.
Open it up and have a look inside. Make sure the fuses are ok and none of the wiring loose is or disconnected.