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no sound from radio

bavarian
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bavarian Member

bavarian

Posted
Posted

Loren/anyone: today I turned on my radio ('04 C4S cab factory Bose) and there is no sound. The radio lights up, all buttons produce the usual visual results, but there is zero sound. Is there a fuse which controls sound output, perhaps for the amp? The factory booklet is notoriously inadequate, and there are no detailed listings for all the fuses in the car.

I have searched this forum without success; I hope it is just a small matter of replacing a blown fuse...

Thanks in advance.

PorschePRH Member

PorschePRH

Posted
Posted (edited)

Have you tried again lately? Mine decides it's not going to put out any sound about 1 out of every 30 starts.... I read on some old messages that this is not uncommon...

Edited by PorschePRH
  • Admin
Loren Member

Loren

Posted
  • Admin
Posted

If the buttons light then it is not the fuse. (BTW... there is a full fuses listing in a booklet on the backside of the fuse box cover).

There is a TSB for BOSE problems with PCM2 where they change out the BOSE amp. If you have PCM2 that could be it.

boli 996 Member

boli 996

Posted
Posted

Have You checked the cd-changer, if the power supply to the cd-changer is gone You will not hear anything.

You can also disconnect the fiber cable to the cd-chanfer and check if You have a red light from the contact. If not You have a problem with the fiber cable or PCM

WARDHOG Member

WARDHOG

Posted
Posted

I have found from owning two 2003 Porsches, if you pull the radio out and look at the connector to see if the O/F harness going to the radio is kinked, straighten out and reconnect. I just rerouted the harness so it was going to the radio straighter and zip tied it so and reconnected. Haven't had one problem since then. :thumbup:

bavarian Member

bavarian

Posted
  • Author
Posted

I don't have PCM2 or a CD changer. I have had this problem before, but only for a few seconds: if I turned the unit off and on again, it would come back to life--not this time (I gave it 45 minutes). If it still doesn't work this evening, I will try Wardhogs idea of pulling it out and pushing it back in, however, it sounds to me like he might be referring to a dead radio without working display.

bavarian Member

bavarian

Posted
  • Author
Posted

Postscript:

When I started my car this afternoon, the radio worked fine. I guess this is one of those gremlins my BMW 745Li is famous for (after 3 years most have been resolved, but there is always another one when you least expect it!)

When I bring my P-car in for its 15K service next month I'll mention the radio problem. The SA thinks I will need a replacement radio, so we will see.

DFC Member

DFC

Posted
Posted
Postscript:

When I started my car this afternoon, the radio worked fine. I guess this is one of those gremlins my BMW 745Li is famous for (after 3 years most have been resolved, but there is always another one when you least expect it!)

When I bring my P-car in for its 15K service next month I'll mention the radio problem. The SA thinks I will need a replacement radio, so we will see.

I have had this same issue happen around 4-5 times over the last 15 months of owning my 2004 C4S. The radio lights up with no sound when I start the car. If I shut the radio off and/or car, the problem still exists. If I wait a 30-60 minutes and start the car, problem resolved. This may have something to do with heat but either way this is a gremlin that Porsche should address with Bose. I too will request them to look into it when I bring my car in for its first service.

PorschePRH Member

PorschePRH

Posted
Posted
Postscript:

When I started my car this afternoon, the radio worked fine. I guess this is one of those gremlins my BMW 745Li is famous for (after 3 years most have been resolved, but there is always another one when you least expect it!)

When I bring my P-car in for its 15K service next month I'll mention the radio problem. The SA thinks I will need a replacement radio, so we will see.

I have had this same issue happen around 4-5 times over the last 15 months of owning my 2004 C4S. The radio lights up with no sound when I start the car. If I shut the radio off and/or car, the problem still exists. If I wait a 30-60 minutes and start the car, problem resolved. This may have something to do with heat but either way this is a gremlin that Porsche should address with Bose. I too will request them to look into it when I bring my car in for its first service.

Me too. And I have seen others post the same thing on other Forums. It's a common problem. Add it to the long list of imperfect traits of this car.

stan Member

stan

Posted
Posted (edited)

I also have this problem on my 04 c2. I found that when this happens, I turn off the car, remove the key and hit the key fob lock on and then off, and this always resets and starts the radio up again!!

Could be a problem with the security system interface with the bose system or the time delay with the radio.

stan

Edited by stan
C4S Surgeon Member

C4S Surgeon

Posted
Posted

Bav, it's part of the security system in the car, mine did it so much the dealer ended up replacing the radio. Still does it, not as frequently though.

  • 2 months later...
tom4film Member

tom4film

Posted
Posted

Has anyone heard of any resolution on this problem? The same thing just happened to me 03 C4S with only factory radio: No Bose, CD changer or PCM. Turning the engine off then locking and unlocking the doors got the radio restarted.

  • Admin
Loren Member

Loren

Posted
  • Admin
Posted

Talk to your dealer - there is a late TSB that talks about BOSE amplifiers needing a software update. The TSB describes primarily PCM2 systems but it might be needed on radio/BOSE systems too.

  • 16 years later...
baranga Member

baranga

Posted
Posted

Just want to chime in as I had this issue and resolved it. might help others. 

03 996 with Bose (optical)

 

My cd changer hasn’t worked for a while. And I’ve had battery depleting. Noticed the Cd changer was warm, so I disconnected it. Radio produced no sound after. I got a $6 MOST loop off eBay, connected that in place of the cd changer and now everything works. 

  • Admin
Loren Member

Loren

Posted
  • Admin
Posted
18 minutes ago, baranga said:

Just want to chime in as I had this issue and resolved it. might help others. 

03 996 with Bose (optical)

 

My cd changer hasn’t worked for a while. And I’ve had battery depleting. Noticed the Cd changer was warm, so I disconnected it. Radio produced no sound after. I got a $6 MOST loop off eBay, connected that in place of the cd changer and now everything works. 

 

:thumbup:

  • 2 years later...
FunWithPaul Member

FunWithPaul

Posted
Posted (edited)

I am a new 996 owner, and JUST had this happen in my 2003 C4S.

I was listening to the radio in the car (with the ignition off?), then got out. I must have turned the radio off (as I wouldn't leave it playing).

 

Next time I got in (I didn't lock it in between, as it was in the garage, and I was going to take it out after dinner) the radio worked, but the sound didn't!

 

I came here, learned what to do (thank you stan), then went out and locked and unlocked the car, and it worked fine.

 

Go figure!

 

Paul

Edited by FunWithPaul

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