scutch

Hi, I was playing the stereo loud today and then the volume went out, but it still seemed to be playing.
Like others, I still have the sound control button on the screen, but, was it the DSP button where you could turn the surround on? That is gone. When I go into the sound controls, it's only bass and treble and they are all the way up. Speaker position is forced into the very back right position and can't adjusted, like other posts.
There was an old post where the person had these exact symptoms and was get gonna get the amp repaired then never concluded his post. So does a bad amp also cause these odd settings? I'll report the conclusion when I get there.

All the stereo elements seem to be counting down songs they are playing, just no volume control on the dial or the steering wheel.
The amp and head unit was replaced by the dealer in 2016.
I checked the 30 amp fuse under the glove box and it had continuity. So OK.
I disconnected the battery for 30 mins. No help.
I don't have leaks in the trunk.
I am guessing the amp is bad.
I know EMVN means Electro Multi-Vision with Navigation. I am just not sure how that relates to whether the amp is bad or not. At first it says EMVN is OK, then when I go into Lan Monitor it says to CHEK, and has codes and dates.
What does Lan Monitor mean? AVCLAN PLUS CHECK?
Will my EMVN errors go away if I fix the amp or is that a secondary problem?
I'll cross my fingers and hope there is a bad connection at the amp.

No more killer stereo is the deepest cut for me and my LS460. Not the stereo!

Thanks for any help.

Here's who people recommend calling to get your Mark Levinson amp fixed for $750 as of 2024.
United Radio
5705 Enterprise Pkwy
East Syracuse NY 13507
315-446-5570

Thought I would post some pictures to help people looking in the future.



Below is the 30 amp fuse to check very easily under the glove box.
This video shows you how. If you want to replace this fuse google search for "Lowprofile Jcase 58V 30A 1Pc: 30 Amp, Pink"


I kept reading about people referring to "System Check Mode" I finally found the directions for a 2007 LS 460. These are very basic diagnostics, but they can help point you in a direction if you don't have a code reader.

Here's how:
-Either turn the car on or just press the ignition twice till all the dash lights are on with your foot off the brake.
-Turn OFF the headlights
-Push and hold the INFO button
- While you are still holding the INFO button, turn the lights On, Off. On, Off. On, off.
You can then look at some of your codes.


I read that NCON means "not connected" for the AMP. If the physical connections at the amp in the trunk are ok, and that fuse above is ok, then a bad amp is indicated.



Looks like my Head Unit is OK.



Has something been brewing?



Looks like my AUDIO errors were in 2020 so I am guess they can be cleared and forgotten.



The XM radio errors also seem old.

Anfanger

ML AMPs are known to fail, it is a common issue.