Hello, everyone! I have a problem with my Xj40 alpine radio unit: when I turn off volume knob, other buttons not work at all, and it seems that forward rev. button constantly pressed. When I turn off volume knob all buttons starting to work fine. I checked all buttons with multimeter and there is no jamed buttons, or shorted circuits in front panel. Also I've cleaned all contacts with alcohol, but it didn't help.
Please, check the video: https://youtu.be/8dAHP_gFCT8
I will appreciate any help, thank you!