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Processeur quad-core Intel Core i7 à 2,3 GHz, 2,6 GHz ou 2,7 GHz (Turbo Boost jusqu'à 3,7 GHz) avec 6 Mo de cache L3 partagé.

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Why is are my fans running at peak and my mouse lagging? (Reset SMC?)

My MacBook Pro suffered a nice blow to the keyboard from an object that fell from an shelf 3 feet above. While there wasn’t any physical damage, my fans immediately began to run at peak and began sounding like a diesel truck. I noticed that there was dust all around the unibody case, my thought was that the impact of the falling object caused the dust to escape the laptop from every crevice it possibly could. I opened the back plate up and cleaned out the fans and whatever else I could get to. When I turn the MacBook back on, the Apple logo and loading bar appear, however as it boot, the fans start running at peak again. It takes anywhere from 5-10 minutes to load the login screen. The mouse is lagging, there’s not backlit key board or light on my magesafe. I’ve tried my MagSafe on another Mac and it works.

I’ve tried to boot in safe mode, same thing.

ive tried to run Apple diagnostics (Press “D” when powering up) - it takes me to internet recovery instead.

ive tried to reset SMC, (followed every instruction out there) - no dice.

ive only been successful at resetting the PRAM.

i don’t see any damage to my RAM, CPU/GPU, my HEAT SINK, or and components on the logic board.

what could be the reason why I can’t reset SMC?

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UPDATE: Finally got TG PRO installed. Here is the screen capture:

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@sofia221 Lets see if the onboard diagnostics can aim us to the area that needs attention. Restart your system and press the D key to enter into into diagnostics. Let us know what the errors you get.

Reference: Mac startup key combinations

par

@sofia221 - Any luck in running the onboard diagnostics? That should aim us to what is needed.

par

I’m trying to run it now. Should I hold D or just press it once. I’ve tried to do this before but it takes me to internet recovery instead

par

@sofia221 - Restart and then press and hold the D key

The URL link I posted above explains in more detail

par

@dan, i tried to run it. got an error "Error: 8000000000003, Cannot load 'EFI/Drivers/TestSupport.efi'

Status: 0x00000003

Looking this up appears to be related to apple updating the apple diagnostics which doesnt allow older macbooks of my year to access the new apple diag tool.

par

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If the device is overheating the fans will run at full speed. Dust can be a factor in this. If it is at startup with a cool device it can mean the heatsink and thermalpaste aren’t doing there job.

In this case it took a hit and although you don’t see any damage i think some components on the logic board might be damaged. This is plausible because this is located directly under the keyboard.

I would take it apart and see if you can spot any damaged components or broken solder.

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So I had the similar thought to component being damaged, I took the entire logic board out and inspected it. Didn’t see any damage to the board or components. I just didn’t want to tear the heat sink off as I’m not supper comfortable with that yet. I’ll look again for broken solder. Any place in particular I should be looking at on the board?

par

Was the impact on the macbook trackpad ? A failing temp sensor on the trackpad will often result fans running full speed.

par

The impact was on the keys, on the letter H specifically

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Sofia sera éternellement reconnaissant.
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