I have seen the how-to schematic and it states no parts needed. Does ifixit.com have the parts needed for this endevour? If so can you send me a link to them? Help please!
Thanks
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Replace the thermal paste. The heat sink is just a hunk of metal.
iMac Intel 21.5" EMC 2389 GPU Card Replacement
[linked product missing or disabled: IF179-010]
UPDATE
If the heat sinks are overheating on the power supply changing them will not help. You need to find the electronic component that is overheating, The heat sinks are just metal vents used to disperse heat, they don't fail. Use an IR gun to help identify the offending component.
Product
$23.99
Guide
Difficulty:
Moderate
—
5 - 20 minutes
Guide
Difficulty:
Difficult
—
50 minutes - 3 hours
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3 Comments
Why are you replacing the heat sink?
The guide is intended for someone to apply a fresh coat of thermal paste and cleaning of the heat sink fins.
How about giving us the full rundown here on what your problem is, it might be something very different!
by Dan
Well my heat sink is overheating and need to change it. The power supply heat sink is overheating and I decided to change rather than buy another iMac.
by docromaniac
@fixbit - Double check using a good sensor monitoring app like: TG Pro. Paste a screenshot of the main screen for us to see here.
by Dan