Fan always on full, mac slow, I believe it thinks it’s overheating
Hi, I recently bought a MacBook Air 2017, it wouldn’t let me install os so i booted into a external usb and installed from there, however the whole time the fans were on full, I guessed it might be because of the missing software but it didn’t stop after, tried all the usual bug fixes, such as smc reset, nvram reset etc, no difference, on a bench mark it scores around a third of what it should, I saw a thread suggesting trying to turn it on without the trackpad cable and battery connected, so I tried that, no difference, however now the trackpad and keyboard do not function, however the power button still works?
Any ideas how I can go about fixing this? It’s very clean inside, no rust or even dust, and what I believe to be the original battery only has 30 cycles on it, so it’s barely been used from what I can gather.
I might try reseat the trackpad cable again tomorrow in case it helps get the keyboard and trackpad working again
Update (03/23/2022)
Oh, I forgot to add, I did a diagnostic on it before trying to disconnect the cables, results were PFM006 and PPN001. Also tried safe mode and had the same issues
8条评论
Did you try running the onboard diagnostics? Restart your system and press the D key to enter. Let us know what the error message is
Reference: Mac startup key combinations
If you can you may also what to install a good thermal monitoring app like: TG Pro even the trial version can be useful. Take a snapshot of the main window and post it here for us to see 在已经存在的问题里加入图片
由 Dan 完成的
I tried diagnostics, above I posted the error codes, and I also tried macs fan control, there I could get the fans to turn down but the performance was still throttling, all of the thermal sensors were fairly cool and looked normal, I checked them
And all appeared to be working - temperatures fluctuated on all sensors
由 Kai Mcpherson 完成的
@kaimcpherson - I don't find MacsFanControl that useful as it doesn't offer enough diagnostic info. Please give TG Pro a try as it has what I need.
PPN001 error is telling me you have a bad sensor but without seeing what TG Pro tells us.
由 Dan 完成的
@danj
Hi, apologies for the delay, thanks for your help with this. I installed the trial and added the photo of the main page, do I need to include any other info from it?
Thanks again
由 Kai Mcpherson 完成的
Hi Kai,
This likely could be a broken pin/not connected sensor causing this. I have a friend who has a 2017 mba and I'll ask him if he's had a similar behaviour.
由 Nick P 完成的
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