Apple iMac (17-inch Mid 2006) - Manual (Page 95)

iMac (17-inch Mid 2006/Late 2006 CD) Take Apart — Optical Drive Fan 
Remove the Optical Drive Fan
Lift the optical drive fan straight up and off three mounting posts.
Replace the Optical Drive Fan
Align and install the optical drive fan on three mounting posts. Push it down snug onto the
posts.
Replace the logic board.
Replace the optical drive.
Replace the hard drive.
Replace the speakers.
Replace the display panel.
Replace the lower EMI shield.
Replace the front bezel.
Replace the memory.
Replace the memory access door.
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