Mark Levinson Sound System Audio Intermittent

[Rosehill1]

My 2006 GX470 Alternator went out last week and everything seemed to work fine after it was replaced except fort the usual seat and window reset, however the ML sound system now loses the audio intermittently when playing the radio.  The Nav display says it's playing but no audio AM/FM.  Has anyone experienced this issue?  

[Lexus Owners Club]

Hi Jerry.....welcome to the Club

I wonder if when the alternator was replaced that they removed a Suppressor from the old unit and it never got fitted to the new one.
A Suppressor works by cutting out any interference from the alternator and it could well be that the audio system cuts out when it encounters excessive white noise coming through?

Alternatively, it could be the Radio Frequency Lock is switched off (the one which auto-tunes the frequency as it changes when you drive out of range, etc)