Radio/CD cycling

[J Ainscough]

My radio/CD unit is cycling through radio, CD, phone and external media constantly. If I hold the power off, it makes no difference. Any idea what the cause is?

[GMB]

It sounds like a selector button is stuck , like when a keyboard key or command key is constantly pressed.  While the car is switched off - Maybe try giving all the relevant buttons a good workout i.e. press firmly, press press many times to see if it releases?

Just a thought, may help?🤔

[J Ainscough]

I'll certainly try this, however the radio is always on. It suddenly went crazy after starting up today. I've tried switching off and restarting but no change to the fault 

[GMB]

Oh well - worth a try before it gets expensive. If it was me I would try disconnecting all the cables to it which would fully power down the radio, but it sounds ominously like an internal issue.  Sorry.

When I worked at a large broadcasting company we had a usual last resort fix before it got too complicated and expensive. It was called the "engineers walk".  We took the offending unit out for a walk and put it down and picked it up firmly a few times, in other words gave it a bit of a beating. Then plugged it back in. Amazingly it sometimes worked, but usually only for a limited time before it finally died.🤓.

PS switch cleaner can work wonders too.  Just one example off google below-