Answer to: Sometimes there is no audio, reboot fixes thingsi had this same issue and only thing that helped was to send it back to onkyo for a repairs. http://www.uk.onkyo.com/en/product-recall-80305.html that link has all necessary info that you need, just fill it up and they will send ups to pick it up and repair it for free. don't worry about your warrant, as my receiver only had 1 year warranty and i bought it back in 2010, and i still didn't have to pay anything for the repairs. and to make things even funnier my original amp was Onkyo TX-NR579 and that one suffered that issue. then i bought that Onkyo TX-NR616 for 50€ used. so needless to say that just before my 579 came back that 616 suffered same fate. so in the end i have used that recall thing two times in the last two months, and except for buying that 616 i have had to pay absolutely nothing.