Amplifier sound problem

[admin_exported]

Hi I have a Harman Kardon 990 amp, recently it became stuck in standby and so was sent away under warranty. It came back fixed but now when I turn it on it takes 10-15min before any sound is produced. The amp turns on and the display is working but theres no sound.

Does anyone have any idea what the problem might be? I'm wondering whether to put up with it or send it away again...

Thanks

 

[altruistic.lemon]

Check with your dealer.