Model A1311 / Mid 2011 / 2.5 & 2.7 GHz Core i5 or 2.8 GHz Core i7 Processor

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No video or sound after replacing the power supply but fan works

I recently replaced my power supply and now I hear the fan power up but have no video or sounds.

What could be the problem now?

I tried the SMU reset but all it did was make the fan louder.

Answered! View the answer I have this problem too

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Chosen Solution

Look at the diagnostic lights on the logic board to get an idea of where to go next.

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2 lights are on. I also see writing that says sys reset and SMU reset but saw no buttons as you listed in a previous post.

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tameyer72 will be eternally grateful.
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