Introduction
Remove bottom housing to reveal the inside of the iMac.
Tools
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Unplug all the cables from the computer, including the power cable. Lay the computer face-down, supporting the neck and base with a soft cloth under the screen.
 
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Open the housing plate.
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A fixed plug connector between the logic board and upper unit will cause some resistance. Pull gently but firmly.
 
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To reassemble your device, follow these instructions in reverse order.
One comment
If you do this - don't you still need to apply a fresh coat of thermal paste to the exposed ends of the two heat-sink posts (that separate when you open a G4 flatpanel this far) - my understanding was that the machine would overheat and you'd be left with didley squat!!
Gregg :O)
amicuset -