Apple iMac G5 Upper Fans, iMac G5, 20-inch User Manual

034-3260 Rev. A

iMac G5
Upper Fans, iMac G5, 20-inch
Replacement Instructions
Follow the instructions in this sheet carefully. Failure to follow these instructions could
damage your equipment and void its warranty.
Note: Online instructions are available at http://www.apple.com/support/doityourself/.
Tools Required
• Use the enclosed tool; Phillips #2 screwdriver or Torx-8 depending upon what type of
screws are present. Note: Torx screws are star-shaped as shown below.
• Screw tray or equivalent to hold the screws
Part Location
Torx screw head

Apple iMac G5 Upper Fans, iMac G5, 20-inch Specifications

General

Brand	Apple
Model	iMac G5 Upper Fans, iMac G5, 20-inch
Category	Desktop
Language	English

Summary

Tools and Safety

Required Tools for Fan Replacement

Lists essential tools like specific screwdrivers and screw trays for the repair process.

Important Safety and Handling Precautions

Covers grounding, static discharge, and keeping the work area clean and dry.

Opening the iMac G5 Computer

Power Down and Cable Disconnection

Steps to safely turn off, unplug, and disconnect all cables from the iMac.

Positioning the Computer for Access

Guiding the user to lay the iMac face down on a protective surface.

Removing External Case Screws

Instructions on loosening the captive screws that secure the back cover.

Detaching the Rear Cover

Procedure for lifting and removing the back panel of the iMac.

Removing the Upper Fans

Essential Static Discharge Procedure

Demonstrates how to ground yourself to prevent static damage to internal components.

First Fan Removal Steps

Detaching the fan duct, disconnecting the fan cable, and loosening its mounting screws.

Second Fan Removal Steps

Removing the second fan by loosening its screws and disconnecting its cable from the logic board.

Installing New Upper Fans

Connecting Replacement Fan Cables

Routing and connecting the new fan cables to the logic board, noting keyed connectors.

Securing New Fans with Grommets

Inserting and tightening screws through the rubber grommets for both replacement fans.

Reconnecting Video Cable and Clips

Reattaching the video cable to the logic board and securing it with metal clips.

Reinstalling Fan Ducts and Screws

Placing the fan ducts back and securing them with their respective screws.

Closing the iMac G5

Realigning and Seating the Cover

Aligning the top edge of the cover with the display housing tabs and pressing it down.

Tightening Internal Case Screws

Securing the back cover by tightening the three captive screws on the rear of the iMac.

Final Power Reconnection and Boot-up

Reconnecting the power cord and turning the computer on to verify the repair.