I used to be able to play CD's just fine. Suddenly all CD's generate a message saying that the CD is "unreadable by this computer" and gives me a choice of initializing or ejecting it. I have an iMac 233MHz running OS 8.5.

Thanks!

I know I had this problem. I didn't bother
fixing it - I started playing CDs on a Dell
which I reluctantly use also, so now I
consider it my boom box. But, I recently put
Os9 on my iMac and CDs play OK again.
Conclusion: it's probably software, not
hardware. (There is an iMac CD firmware
update you can download from Apple's website,
but try other stuff first.) Here's stuff I
would try. First: throw out the Apple CD
player preferences in the system\preferences
folder & try again. Second: go to Ext Mng
control panel and restart in base set and try
again. If it works, you know it could be a
problem with some other extension. Sometimes
just duplicating the base set and slowly
adding your other extensions can make
everything play nice together again. Third:
reinstall Mac Os from you

same thing just happend to my rev. A
iMac. i just ended up starting with no
extensions but that didn't work and then i
started with base extensions and it
worked. i then enabled all my other
extensions at the same time and the
player worked again. hope this helped

Try a reinstall of the OS from the disks
that came with your iMac.