my beloved qu 24 is out of warranty and also no output so I sent it to Digitron electronics (a licensed service center).very nice folks out there in california.was diagnosed as needing a circuit board so i sent payment for repair plus return shipping however they say something else is wrong but can’t figure it out.They said it may have to go to allen and heath.been there since oct 23. not saying anything is wrong yet just wondering if anyone has had similar experiences? thanks, Fred