Bad left I/O board?
Hey all!
My MacBook has had some issues that are pretty weird. On power up, it would have no backlight, no charger led, but the screen itself would come on (you could see it by shining a flashlight on it). The computer would boot, but here's where things get odd.
After about 5 seconds of being on the login screen, the computer would “sleep". The backlight never came on. The computer showed the apple logo and stayed on for the duration of the boot, but soon after the login screen showed up it would turn off. I could wake it up again by pressing a button, and it seems like it's sleeping because if I manage to log in before it shuts off, it wakes up and makes me enter my password again since the computer locked.
I opened the computer up and I found that when I unplugged the ribbon cable that connects the left I/O board to the logic board and booted the backlight comes on and I'm able to use the computer normally except for the fact that it's unbearably slow, the fan is at full speed constantly, and there's no sound. As soon as I plugged the cable back in, however, the backlight dimmed and the computer went to sleep.
The charger light never comes on.
Is this the work of a faulty I/O board or is this a bigger issue like a bad SMC?
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2条评论
Lets check the battery, install this app CoconutBattery take a snapshot of the main window and post it here 在已经存在的问题里加入图片
You'll need to use an external display if you can't see it on the screen (try a flashlight shining in through the Apple Logo]
由 Dan 完成的
I know for a fact it's bad, but I couldn't run it anyways as it either goes to sleep too fast with the cable plugged in or is unusably slow with it unplugged.
由 Johnathan Eilers 完成的