Cool it lives
Audio wasn't working until I blew into the headphone jack.
I never knew there was a little red light in the jack if it detects something plugged in?
I should have taken a photo before blowing in it ?
17 seconds to login from chime ?
Cost the same as 2 packs of cigarettes in Australia ?
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Good to hear you got your iMac working again. Please eventually post again with an update as I'll be interested to hear what thermal paste you used, and how long the 'heat-gun fix' lasts.
For a GPU fix of this nature I'd advise anyone to perform an 'oven GPU bake' fix, as imho the chances are it will give a longer lease of life, especially if the following tips are observed:
i) Use an excellent non-conductive K4-Pro thermal paste for the gpu chip.
ii) Use really generous amounts of K5-Pro for the other 11 chips on the card.
iii) Install & set up Macs Fan Control app.
iv) Scale down the screen resolution from 2560x1440 to 1920x1080.
HERE's a link to my second attempt at reviving a defective GPU, and so far this 2009 iMac 27" has been functioning flawlessly for the last 6 months - web browsing is very rapid, and performs adequately for photo editing and other tasks I require, but obviously these tasks have been aided by the SSD I installed.
The 1st baking fix attempt I referred to in the link and which lasted 8months,
may have died prematurely because the owner had de-installed Macs Fan Control and reverted to 2560x1440 screen resolution. (I minor correction to that linked post is that High Sierra was installed and not Mojave).
I'll also eventually provide an update to this to advise of continued serviceability or otherwise.
Purchased as a non-functioning unit, this iMac was very cheap. Two photos follow of this same iMac now performing admirably!