Fix For Mark Levinson (Others May Be Similar) Buttons Not Working

[Dim Tim]

Hi all,

Just recently bought a CT200h and the ML audio was faulty. To be fair, the guy did point out that the volume control on the centre console wasn't working but it did other things instead. (the volume on the steering wheel is working).

I discovered that the volume issue was small compared to the issues of changing discs etc. so I decided to have a dig around because the price of a head unit is hideous. Thinking that there seemed to be a logic problem I disconnected the Battery (reset?) but that didn't do anything. Then decided that it was a pain in the ***** playing around so I pulled the head out to take it apart and see if there was any way to do a logic reset.

Turns out that it was a poor connection on a ribbon cable.

Here is how I fixed it. Remove the head unit from the car (there are instructions elsewhere online about that). With the head unit on the bench remove the half a dozen or so small screws that hold the black plastic front panel on. Pull off the two knobs and release the few plastic clips that hold the front panel on.

BE VERY CAREFUL RIBBON CABLES ARE FRAGILE !

There is a ribbon cable that connects the front panel to the unit. Stiff areas at each end of that ribbon cable allow it to be pulled CAREFULLY out of each socket, Start with the one on the panel itself and then remove the ribbon from the unit NOTING THE ORIENTATION. Clean the ribbon cable and then re-install it. Reassembly is simply a reversal of taking it out.

Damn site cheaper than a head unit and I am well chuffed.