I have a 2004 with no navigation and Mark Levinson audio. Head unit works however when I bought it no sound. I removed the amp fuse, it looked fine and reinstalled. There is sound now however when ignition is off the speakers have a recurring noise that doesn’t stop. When I put amp fuse back in there was a spark so thinking perhaps there is a short somewhere perhaps however it doesn’t blow the fuse. For now I removed the fuse. Any suggestions or ideas. Thanks.

 

When you say there's a recurring noise with the ignition off, do you mean when the engine isn't running, or when the key is removed from the ignition?

Trace the wiring from the amp to the headunit looking for a short? Not a real fun job, but that's a very strange problem.

 

Sounds like the amp is overheating and on it's way out. You can either send it in for repair or buy a new one.

 

The audio works as expected however when vehicle is turned off regardless if key is in ignition or removed there’s a recurring sound in speakers. It happens regardless how long system is operated so don’t think amp is overheating but power is definitely still happening to create the noise.

 

What kind of sound? Can you upload a video of it to Youtube?

Chip H.

 

Following.. I am dealing with a similar issue and would think we both a new AMP in the near future.