OMG , this is a real nightmare !! 🙁 My stereo 150 Johnson Millennium have those endless knobs, ya know, but none of them are working properly. When i turn ANY knob left /right it doesn’t change the parameters , or does the exact opposite from what i want . I’ve tried WD-40 Cleaner, thinking may be too much dust inside the knobs but it didn’t solve the problem. The Johnson Amp site’s webmasters said it’s a software problem, i’ve tried to update it several times but failed ’cause the "shaking hands with the device" takes literally forever :confused: Anyone have had a similar problem ? Any advice or ideas will be much appreciated 🙂 Thanx ! William