Question about Car Audio & Video
I have a sony CDX m9900 and for some reason the ATT function is constantly on stopping any sound coming through the system. I go into the menu and turn it off but still no sound is coming through.
Was working fine one day then suddenly this function came on.
Have a blew the internal amp by any chance ? and is this a possible fix.
or is it something so simple that im missing it ?
Thanks in advance.
First thing i would check m8 is the cellular mute wire that is behind the head unit coming out of the main radio loom plug if the wiring is bare on that wire and its touching the stereos metal body or the black earth wire then that will make the att will come on because it thinks its recieving a call off a car kit so it mutes the radio automatically !
hope that sorts your problem out ;)
Posted on Nov 19, 2008
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Posted on Jan 02, 2017
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