Just got myself a Quad 306 (M12890-6, latest board), with one working and one dead channel (just hum).
I haven't powered it up yet, but there are a couple of burned out resistors that are obvious, and some weird looking 'residue' around a couple of the Power Transistors. Ran a few very brief checks, there are no short circuits on any of the transistors, so I'm hoping that they are OK...https://uploads.tapatalk-cdn.com/201...191de9470b.jpghttps://uploads.tapatalk-cdn.com/201...b85acdcb5c.jpghttps://uploads.tapatalk-cdn.com/201...802560f14a.jpghttps://uploads.tapatalk-cdn.com/201...4ef6d54881.jpghttps://uploads.tapatalk-cdn.com/201...a0c2f3f6e6.jpg