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2.0GHz, 2.3GHz, or 2.6GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.8GHz) with 6MB shared L3 cache.

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GPU Nvidia GeForce GT 750M temperature

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My MacBook is working slow and fans work maximum. What should be the problem?

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After I did D key.

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Beantwoord deze vraag Dit probleem heb ik ook

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Let's run the onboard diagnostics to check things first. Restart your system and press the D key. Did you get any errors?

Reference: Mac startup key combinations

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@danj I did. It says about Camera connector but I already removed it.

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@danj Hi , Please see the result

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So you have a bad connection on the logic board or the camera cable is damaged if you didn't disconnect it.

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@danj I just put a picture of what I did. :((

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Ah! Then you’ve created the problem!

SMC will reduce the CPU’s clocking and raise the fans RPM’s as it wants to protect your system from overheating! Which is what SMC is worried about.

When you disconnect either its thermal or voltage sensors you triggered SMC into this state.

The solution is fix the defect in the camera connector

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I can't put back the connector because I took it from its root and now there are not pins.

Which pin is more important? I can see 12 pins here.

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@armin1 - Sorry to hear you messed up your logic board connector. Take a some pics so we can see clearly the logic board area as well as the connectors pins so we can see what it will take to fix things.

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Is there any hope to fix this issue?

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@armin1 - Sadly you really did your self in here ;-{ I don't see any solder pads so the connector has the remains of them on it. This will take someone with very good micro-soldering skills to patch your logic board up, otherwise its time for a new logic board or just live with things as they are now.

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@danj I cleaned the area very well, now you can see some pads.

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Armin zal eeuwig dankbaar zijn.
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