Chosen Solution
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
Morning Kai, This sounds to me like a certain sensor has broken or is at an unreasonable value. This means you’ll need to check the voltage. if this computer was brand new and is having issues then you should be under consumer law (Unless u arent in Australia) but otherwise sounds like a thermal sensor issue.
@kaimcpherson - Sorry for not responding sooner, I’ve been very busy the last few days with the marathon This is starting to look like a tach logic within the logic board needs repairs. Here’s the logic which needs to be checked
You need check these two components
