Apple IMAC User Manual - Page 109

Troubleshooting Symptom Charts/ CD-ROM Not Showing on Desktop/Can't Open CD-ROM Not Showing on Desktop/Can't Open CD Unable to see the CD on the desktop or to open a CD that is loaded into the drive. Note: A certain amount of CD-ROM drive vibration is normal. If the drive is vibrating loudly use the iMac CD Update v.10 to update the firmware on your CD-ROM drive. Refer to the following symptom "CD-ROM Vibration" for additional information. 1 Try using a known-good compact disc. 2 If the CD-ROM drive fails to mount, boot off the system CD that came with the unit. Do you see the CD-ROM drive on the desktop now? Yes: Reinstall system software. (You must use the system software CD that came with the unit to get the correct version of Mac OS 8.1 with the appropriate iMac enablers.) No: Go to next step. 3 Check all cables running to and from the CD-ROM drive at both ends and make sure they are attached securely. 4 Clean the CD-ROM drive lens. 5 Replace the CD-ROM drive. 6 Replace the hard drive/CD data cable. 7 Replace the logic board. CD-ROM Vibration CD-ROM vibration is typically caused by unbalanced CDs when spinning at higher speeds in the internal CD-ROM drive. This vibration may cause the drive to have difficulty reading the CD. 1 Try using a known-good compact disc. 2 The iMac CD-ROM update v.10 has been posted to Apple SW Updates web page. The CD Firmware Update reduces the amount of vibration caused by certain CDs in the internal CD-ROM drive. The iMac CD Firmware Update application places new firmware on the CD-ROM drive to reduce the amount of disc vibration.