randomist 0 Posted October 1, 2008 got a sony mdx-m690 mini disc head unit in my car & for some reason the control buttons on the left side have stopped working! the control buttons on the right work fine & it works fine using the remote. any ideas what the problem could be? i've tried cleaning the contacts at the back & checked the wiring but still no joy..... also does anyone know if any sony head unit would be compatible with the sony multi changer i've got in my boot? Quote Share this post Link to post Share on other sites