Denon avr x1200w A/V problem

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Hi, i have a strange problem with my avr. After a short power outage the avr turned back on but it was not displaying anymore on tv(hdmi) and it had also no sound from all inputs! If i do a factory reset it shows initialized but it takes 3,4 hours to reset, after that it works again(the only thing missing is the smart menu, setup screen is displayed ) until i turn it off (stand by).
I have the service manual the voltages seem fine when it has no A/V output, i dont have an o´scope for further measurements. I´ve noticed that ic731 (ADV7623) is getting hot, is this normal ? Can someone please help with this problem ?
 
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