Cd Drive in Mac iBook 4 is malfunctioning. Disc will not mount.
Shut the machine down. Find the original CD or a retail OS X installation DVD. Start the machine up and immediately hold down the option key. You will see a icon of your hard drive. Now insert the CD or DVD. If it immediately spits out, your optical drive needs replacement. If it does not, click on the U-shaped arrow button to rescan the drives. If the CD/DVD does not show up, your optical drive needs replacement. If it does, choose it and boot from it. If this actually works, you may have a software problem -- this is low probability, but possible.
Keep in mind that the CD and DVD read heads are separate. If one of those is malfunctioning, your drive will accept CDs but not DVDs, or vice versa. If you see this behavior, your optical drive needs replacement.
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