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Versione corrente di: Kevin Omura ,

Testo:

Sounds like you’ve tried most of the things I would have tried including the cmd+opt+p+r pram zap.
Longshots, did you pull the memory backup battery, and then with unit unplugged push and hold the power button for 15-20 seconds?
Second long shot if it’s the video card, you could attempt to reflow the soldier on it using a heat gun. I use a small butane torch instead but basically you are trying to heat up the GPU just enough to reflow the soldier connections. Later iMacs actually had a recall on bad video cards.
+
+When you pulled the iMac apart did you notice any smells of burnt parts? Especially around the power supply area as the surge could have blown something back there.

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Post originale di: Kevin Omura ,

Testo:

Sounds like you’ve tried most of the things I would have tried including the cmd+opt+p+r pram zap.

Longshots, did you pull the memory backup battery, and then with unit unplugged push and hold the power button for 15-20 seconds?

Second long shot if it’s the video card, you could attempt to reflow the soldier on it using a heat gun. I use a small butane torch instead but basically you are trying to heat up the GPU just enough to reflow the soldier connections. Later iMacs actually had a recall on bad video cards.

Stato:

open