Scott MDX i62 120W - no audio !

Hello everyone, my name is Mattia, I bought this Scott MDX i62 stereo in 2005 / 2006 and it worked fine all these years till the last 3 months. Audio started to disappear when it was turned on, and then it would randomly come back after 5 or 10 minutes. Then it became 20 minutes, then 30 and now it's just permanently mute. It turns on fine but no audio.
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Is there anything I should check that caused this problem? the audio board seems to be fine overall and I see no burnt capacitors at the outputs. The only thing I've tried so far is a reflow with hot air and flux. Thanks in advance, if Anybody can help 😊
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