No video after GPU replacement

No video and fans go to max
2 of the four lights come on on the motherboard

@danj @oldturkey03

UPDATE 2/14/2022:

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What did you replace exactly!

The Fans go into high RPM when SMC looses access to one or more of its sensors.

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I replaced the GPU slapped everything back in and no video showed up,

What display cables do i need? so i can check it

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Should i post a picture?

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What was the part you put in we need the details.

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@danj Only the GPU

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