NAD AV.716 stuck

[JJsan]

<font color='#000000'>I have a NAD AV.716 reciever. Some days ago, the system seemed to have frozen. Not ANY of the frontpanel buttons respond anymore. I can only switch it on/off by plugging/unplugging.

Is there some kind of button combination that I can press during power up to fix this very nasty problem?

HELP ME!! &nbsp;

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[Audioholics]

<font color='#000080'>Have you contacted NAD?</font>