MacBook Air shuts down suddenly
For a couple weeks the Macbook Air has been shutting down suddenly. It might work fine for a few hours, then the display goes black and it’s shut down.
To restart it, I have to wait a few minutes, or unplug the Magsafe and then plug it back into the computer, at which point it starts up. After the first shutdown like this, the second usually comes faster, e.g. after 15-20 minutes.
What I have done:
1) reset the SMC and PRAM.
2) used the Air with the battery unplugged; it seemed to fix the problem, so I bought a new battery, which works fine, but the sudden shutdown problem has reappeared.
3) replaced the I/O Board cable.
4) removed the internal SSD and started the Air from an external disk.
The problem persists, though.
At this point, what do you think?
I/O Board?
Thermal paste on the processor/heatsink? (The Air doesn’t get really hot.)
Or the logic board itself?
At this point I’d like to try to fix it without replacing much, due to cost.
I’ve seen in the guides that replacing the thermal paste is a fairly long procedure, but if you think it might be the problem I would try that first.
Many thanks.
Update (03/07/2020)
Ok. Here are pics from Coconut Battery and TG Pro. Thanks for any help.
6条评论
Install this app to monitor your thermals TG Pro See if ramping up the fan helps.
由 Dan 完成的
I also tried to do the Mac Hardware test (boot with D) and ran the extensive test, but both times the Macbook Air turned off during the test.
I originally tried to increase the fan speed, using Macs Fan Control to set a higher constant speed. But the Air shut down anyway.
由 Matt2020 完成的
OK, Lets check the battery & charger. Install this app CoconutBattery and post a snapshot of the main window 在已经存在的问题里加入图片
I would still install TG Pro as well as it offers better clarity on whats happening.
由 Dan 完成的
I used Coconut Battery right after installing and charging the new battery. Said the battery was 7300 mAh, 100% of original capacity (1 charge), condition "Good".
To check the battery, I ran a video on loop for hours and let it run out. I checked it after about 4 hours and it was still going, so I left it. When I came back the comptuer was off, but I don't know if it shut down suddenly or because the battery ran out.
I recharged the battery and found that the sudden shutdown problem persists, whether on battery power or charger.
由 Matt2020 完成的
I go back the trying to understanding whats happening thermally. Without a snapshot to review I really can't help you.
Think of it like calling the doctor telling him you have a bad cough, he asked you to take your temp to see if you have a fever and while you have it, you don't use it, and you asked again doc what should I do?
How can the doctor advice you without some data? You could have many different ailments and have no means to reduce the possibilities with such a simple test as taking your temp.
So what do you think we need here?
由 Dan 完成的
显示更多的1条评论