Audio/Data CD's won't mount

On a Mac PowerBook G4, built in CD/DVD, I can't make cd's mount.  DVD's mount and play fine, but CD's won't.  I can't seem to open system profiler (About This Mac has no "more info" button, and it's not in /applications/utilities).

I don't know very much about hardware troubleshooting on a mac, so anything you can offer would be awesome.
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netsmithcentralAsked:
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bthomasianCommented:
DVD/CD combo drives have 2 seperate head mechanisms IIRC - so I assume that the CD head assembly died or was damaged in someway, and the DVD head assembly was still good. Can you get another drive to test to confirm or maybe take to an Apple Store?
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Irwin SantosComputer Integration SpecialistCommented:
is it burned CD's or store bought music discs that cannot play?
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netsmithcentralAuthor Commented:
Both
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Irwin SantosComputer Integration SpecialistCommented:
Locate your CD player and launch.  Insert your CD, what happens?
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netsmithcentralAuthor Commented:
I'm using iTunes for playing CD's.  The CD just ejects itself after trying to mount w/ or w/out iTunes open.
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Irwin SantosComputer Integration SpecialistCommented:
there is the default CD player that comes packaged with your MAC.. use that one.  if you are not able to play them, the bthomasian suggestion is the next thing to look at.
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ParadiseITSCommented:
It sounds like the system profiler may not be installed on your Powerbook.

If your powerbook is kicking the CDs out before mounting them, that means the drive cannot read the CD.  It does sound like the drive itself may be damaged if you are putting in a factory CD and it cannot read it (like a Microsoft CDROM or something like that).

Try powering down the powerbook, then powering it backup, immediately insert the Apple Hardware Diagnostic CDROM that came with your Powerbook before your OS comes up and try to boot from that CD by holding down the C key during this process.  This is a timing thing, so be patient with it!

If the drive will take the CD at this time, run the hardware diagnostics and see what it says.  If not, then you definitely have a hardware problem with your optical cdrom reading mechnism.
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