Replace reed switch/hall effect on MacBook Pro
Hi,
I have a Macbook Pro Retina (a1398), and I need some help.
A few days ago I closed the Macbook lid, it went to sleep, but the I opened it back, it never came back on.
I tried to force a restart but the power button did nothing. It seemed like the mac was dead.
I opened the bottom case, disconnected the battery, and connected the power cable and the mac started ... I can ear the mac chime, but the screen turns off after a second and it never shows any image.
I did a PRAM and SMC reset and the problem still persists.
I connected a external monitor and I can see everything on the external screen.
I tough it was a LCD issue, but then i noticed that the keyboard and trackpad stop working a few seconds after the OS boots. If I connect a external keyboard and mouse I can work normally.
So I believe that my Mac thinks it has the lid shut. That's why it shuts down the screen after a second or two when it boots, and when the OS boots, it shuts down the onboard keyboard and trackpad.
I don't know if this mac uses a reed switch or hall effect sensor. I searched Google but I wasn't able to find anything about this macbook model, so i could replace the defective part.
Can someone please help?
Thanks in advance.
Update (03/19/2018)
Hi Dan thanks for your reply,
The bottom cover has been off since I started having these issues.
Here is the result of CoconutBattery (yes, I let the battery fully discharge on as a test).
Esta é uma boa pergunta?
7 comentários
I found another thing that supports my thoughs on the problem being with the reed switch/hall effect.
When I am connected to a external screen OSX is running in clamshell mode.
Clamshell mode is activated when you close the lid and it requires ac plugged in... if you remove the ac, then the laptop will go to sleep.
This is happening with my macbook. If I remove ac, it always goes to sleep... if I plug it back in, it will resume (only on the external screen)
I installed InsomniaX and activated Disable Lid Sleep option which changes the OS so that it doesn't go to sleep if the lid is close.
After that removed the ac plug and the laptop stayed on.
So the macbook is detecting that lid is closed. That's why if I remove the AC (without InsomniaX running) it goes do Lid sleep.
Is there any way to test the hall effect sensor?
por Sérgio
Another thing
If I run on terminal the command ioreg -r -k AppleClamshellState I get:
"AppleClamshellState" = Yes
This states that Im in clamshell mode when that should not happen when my lid is open
por Sérgio
I have a very similar issue. MacBook Pro Retina 13-inch Late 2013. Everything works on it great. It powers on, it boots up, and everything works. If i put the computer to sleep manually via the Apple menu - no issues, it wakes up with the stroke of a key. If I close the lid or simulate closing the lid with a magnet, it will go to sleep and WILL NOT WAKE UP. I can't even hold down the power button to shut it off and restart it. I have to open the bottom, disconnect the battery, do an SMC reset (mandatory), plug it in without the battery connected, and then it will power on. I will have to immediately do a PRAM reset or it will boot to the recovery partition. Any help would be greatly appreciated.
Blake
por blake
In my case it was the motherboard, and unfortunately I had to replace it (not cheap).
por Sérgio
That's what I'm doing...
por blake
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