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You are here: MacNN Forums > Hardware - Troubleshooting and Discussion > Mac Notebooks > 1Ghz PB Audio Output trouble...Mono only!! Help!!!

1Ghz PB Audio Output trouble...Mono only!! Help!!!
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Fresh-Faced Recruit
Join Date: Jan 2005
Location: Canada
Status: Offline
Jan 13, 2005, 01:45 PM
 
Hey guys, I just started getting a strange problem with my G4 1gz pb (titan.). When I listen to it through headphones, I only get mono output. The people at the mac shop told me it was my logic board (assuming it was only the headphones jack) but I tried it with an external sound card via USB and the problem is still there.....any ideas what could be causing this? Software or hardware? I really hope it is not my logic board ($1000CDN to replace the thing)....please if you guys have any info please let me know.Cheers and thanks a bundle-Myxomatosis
theresagapinbetween
whereiendandyoubegin
     
Mac Elite
Join Date: Jun 2004
Location: Edmonton, AB
Status: Offline
Jan 13, 2005, 05:48 PM
 
Originally posted by myxomatosis:
Hey guys, I just started getting a strange problem with my G4 1gz pb (titan.). When I listen to it through headphones, I only get mono output. The people at the mac shop told me it was my logic board (assuming it was only the headphones jack) but I tried it with an external sound card via USB and the problem is still there.....any ideas what could be causing this? Software or hardware? I really hope it is not my logic board ($1000CDN to replace the thing)....please if you guys have any info please let me know.Cheers and thanks a bundle-Myxomatosis
You can get a motherboard replaced for less, some resellers overcharge for repairs. You could try reinstalling the os or a different pair of headphones.
     
Clinically Insane
Join Date: Nov 1999
Location: Where Airbus babies hatch
Status: Offline
Jan 13, 2005, 06:22 PM
 
Do you really mean mono?

I assume you mean that only one channel is working (i.e. either right or left). That's not mono, that's just one channel not working.

If you're getting the same symptom via a USB audio interface, then it's rather unlikely that the motherboard is at fault.

Have you checked the sound settings in the System Preferences? Sometimes the stereo pan slider would get moved over to one side, resulting in uneven stereo balance.

This bug has been fixed in one of the newer system updates, IIRC.

-s*
     
Fresh-Faced Recruit
Join Date: Jan 2005
Location: Canada
Status: Offline
Jan 13, 2005, 08:26 PM
 
Thanks for the input guys...
I do stand corrected...it is not mono in the true sense...the right side headphone is dead...left side works fine.
When I play it through my USB (roland UA-30) interface, both headphone speakers yield sound fine but are only splitting what would normally come through only the left speaker in half...if that makes sense.
My internal speakers work fine. I've checked the slider in Sysprefs and when I put it all the way to the right, no sound. I'm running a fully updated version of OSX panther. ...haven't tried to reinstall. I am glad that my suspicions about the mother board seem to be holding up....didn't make sense that both the USB and headphones jacks were faulty with the same symptoms (which is what the mac guys tried to tell me...I now have it back with them, this time with USB interface in tow!). I only took it there in the first place because I thought they'd have a much better diagnostic set-up then apparently they really have...Anyodd any more info would be super...Cheers and thanks for your time guys/gals.
-myxomatosis
theresagapinbetween
whereiendandyoubegin
     
Admin Emeritus
Join Date: Oct 1999
Location: Zurich, Switzerland
Status: Offline
Jan 14, 2005, 11:37 AM
 
NEVER cross-post. You may post your question in one forum only.

tooki
     
   
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