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2.2 GHz (Turbo Boost up to 3.4 GHz) or 2.5 GHz (Turbo Boost up to 3.7 GHz) quad-core Intel Core i7 processor with 6MB shared L3 cache.

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Changer thermal paste, checked the temperatures in game, dead

What happened:

1. I changed thermal paste, no issues

2. Loaded the game with fans on max (used utility), got good stats

3. Changed fans speed to system control

4. Game freezed, Mac went into the bootloop

5. Shortly after it stopped, only fans were silently spinning

6. I checked all of the basic suggestions such as reset this and that, but black screen is still there with fans silentry spinning

I recorded entire process on video, here's the link if this might help you to help me: Macbook 15" 2014 Thermal Paste Replacement

Answer this question I have this problem too

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Do you get USB activity?

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@imicrosoldering, Just plugged my phone and got it charging.

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Disconnect the battery, then press the power button for 15 Sec’s to clear SMC. Now plug in the battery and restart your system but this time press the Shift (⇧) key to enter into Safe Mode which by passes the discreet GPU your system has. Did it boot up?

Reference: Mac startup key combinations

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Just went through an entire procedure and still nothing. Black screen, no boot up sound, fans are silently spinning.

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Then something got damaged in your process. At this point you'll need to either find someone with the needed deeper logic board repair skills or just replace the logic board.

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Elophostia will be eternally grateful.
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