Apple iMac G5, 20-inch - Manual (Page 158)

156 - iMac G5 (20-inch) Take Apart Midplane Assembly-Short Cut
20. Flip the cable back, so it is out of the way for the next step.
21. Locate the pull tab. Pull the tab up to raise the midplane assembly. Then hold the
midplane on each side and pull the midplane up and out of the display/bezel. If it is
difficult to remove, make sure the captive power supply screw was turned completely
counterclockwise. Note: The captive screw sleeves (near the speakers) on the
midplane fit tightly into the display/bezel assembly, tug the midplane to release it.