Model A1225 / Mid 2007 and Early 2008 / 2.4, 2.8, or 3.06 GHz Core 2 Duo processor

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Boot problems! Will only start up after the third attempt?

I have a weird issue with a 24" Imac. When I plug the computer in the first diagnostic led is on when I press the power button I get 3 lights hear a half chime and it stops. All lights go out including the first light. I unplug it plug back in 1st light comes back on, press power and get 3 lights again and the half chime all go out.

The third time

I unplug and re plug again 1st light comes back on but this time it boots right up all lights full chime and screen comes on.

At first I thought this was a power supply issue but wouldn't the first light stay off when I unplug it a re plug in if it was the power supply?

After I get it to come on the third time, I can turn it off an on normally until I unplug it and let it sit for a while. Then I have to do the 3 time unplug deal.

I have replaced the Pram Coin battery, and reset the pram.

Any Ideas what might be causing this?

Answered! View the answer I have this problem too

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Chosen Solution

I do a reflow on the GPU or replace it.

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Comments:

Thank you I will give it a shot. So since the 1st light comes back on when I unplug and replug it should be fine?

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All that fire light tells you is that the power supply is at least getting trickle power. I really dosen't even tell you if the supply is good.

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LEFHANSEF will be eternally grateful.
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