Stereo shuts off after a loud POP sound

[impersus]

When I get in my 2003 Boxster I sometimes (seemly random, yet only when cold) and I hear a loud POP sound through the speaker system. If the radio is on, it shuts off and comes back on with Porsche logo on screen but no sound. Turning off the car and back on does not fix it, however pressing the CD button causes it to shut off again and then go to FM station preset 1.

The key does not have to be in the ignition for this POP sound to occur. Sometimes it happens just after I open the door before I can put the key in.

The alarm module under the drivers seat was replaced recently, but I do not recall if it preexisted that. The previous owner had the stereo replaced by Porsche a few years ago, but I don't know why he had it replaced.

I was guessing the amp was bad, but I'd rather be wrong. Any help?

[JFP in PA]

It does sound like an amp issue..........sorry for the bad pun!

[Richard Hamilton]

Do you have Bose? If so, it might be the "sporadic sound failure" problem. There is a TSB on this subject, and an amplifier update CD.

[impersus]

I'm new on here, what's a TSB?

[impersus]

Yes it's a Bose

[JFP in PA]

I'm new on here, what's a TSB?

Technical Service Bulletin...........

[impersus]

sorry to be ignorant on that. so where do i find this bulletin at, and where can i acquire the cd to update my system?

[JFP in PA]

sorry to be ignorant on that. so where do i find this bulletin at, and where can i acquire the cd to update my system?

TSB's are available to contributing members here, or you can try contacting your dealer. The CD would be a dealer item.

Edited December 10, 2010 by JFP in PA