Model A1174 with 2 GHz Core Duo or Model A1207 with 2.16 or 2.33 GHz Core 2 Duo

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upgraded CPU and now no power

So I took the plunge and upgraded the CPU from 2.0Ghz core duo to 2.16ghz core 2 duo. Now I have no power and all that happens when I hit the power button is the light blinks once, shuts off and nothing happens. I have reseated the memory many time and I have even completely taken it apart and tried a second CPU of the same specs and still get the same issues.

Does anyone have a clue what could be the issue?

My last resort would be to take it apart again and put the old CPU back in to see if it boots and I didn't fry the board at some point.

I was really careful and even cleaned every thing out with a compressor because the thing was disgusting with dust build up.

Any help before I take a 3rd plunge would be appreciated.

Answered! View the answer I have this problem too

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So I may have figured out my problem. I am using a t5850 processor 2.16ghz. It fits in the socket with no issues but it may not be compatible.

Can someone please confirm this that may have tried the upgrade?

thanks again,


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Chosen Solution

AFAIK you have to "upgrade" to a CPU used or "offered" by Apple... the EFI firmware won't support anything else. See Can you replace the i5 processor with an i7?.

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This didn't really help but thanks for trying.


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Most Helpful Answer

Run through my answer here and see if it helps: Core Duo CPU upgrade to Core 2 Duo CPU?

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