2 Left Fan at full speed even when computer is switched off
Hi community,
One day after a long storage time I switched on my MacBook Pro 13" 2020 (A2251) and the left fan was on at full blast all the time — even with the machine switched off. The fan (usually 8881 rpm) only switches off when the machine goes completely out of battery.
I tried SMC and PRAM reset to no avail, reinstalling the operating system didn't help, etc etc. I downloaded MacsFanControl but I can't reduce the speed or switch off the fan using the software (btw, right fan is ok, usually at 0 rpm—maybe to compensate—but can be controlled ok using MacsFanControl). The laptop just went out of warranty and I would like to avoid bringing it in for repair.
I am no expert but it feels like there must be some physical component (like a transistor) that has some issue. There was no water spillage whatsoever (not that I remember of at least), I just left the computer stored in a drawer inside its laptop case (protected from dust) for a few months while on parental leave. However, the computer was stored under a heavy pile of paper sheets (maybe 3-4 pounds). I'm unsure this could have caused the problem.
Could a fan replacement help? I am not convinced of this option because the fan is actually working, what is not working is the control of the fan speed. Any input is welcome!!
Thanks in advance you all,
sil
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5条评论
Hi
Has the device been dropped?
It might be a dodgy connection for the fan!
It could be a verity of other things though
由 HelloMacOS 完成的
Hi,
No — it was a while ago, but I doubt I ever dropped it.
Do you suggest trying to open and connect/disconnect the fan first?
由 sil 完成的
I would to that first before ordering a new fan
Also while you are in there I would check so see if they are dusty
由 HelloMacOS 完成的
Let run the onboard diagnostics to see what it tells us. Restart your system and press the D key to enter, let us know the error code/s it told you.
Reference: Mac startup key combinations
You might want to install this great app TG Pro. I find it offers a great view into your thermal system between the sensors and fan's.
由 Dan 完成的
Hi Dan,
I did run the diagnostics and—surprise surprise—Apple tells me "There may be an issue with the fan".
Below are the details:
Reference code: PPF003.
Additional reference code: PPF004.
Any more thoughts?
Thanks!!
由 sil 完成的