Macbook pro A1278 blackscreen

gistfile1.txt

先要排除你是否开合盖子太快了。 如果不是再确定一下是否每次都这样？ 如果每次都这样，那么可能情况： 1、安全睡眠的文件出问题了。 2、可能是你的睡眠模式设置为休眠了（即每次都要点开机）。 解决办法： 1、打开 终端（Terminal)，输入pmset -g; 查看如下 Active Profiles: Battery Power -1 AC Power -1* Currently in use: standbydelay 4200 standby 0 womp 1 halfdim 1 panicrestart 157680000 hibernatefile /var/vm/sleepimage sms 1 networkoversleep 0 disksleep 10 sleep 90 hibernatemode 1 ttyskeepawake 1 displaysleep 6 acwake 0 lidwake 1 hibernatefile是你的睡眠文件的全路径，确保是/var/vm/sleepimage. 如果不是，请修输入命令改为 sudo pmset -a hibernatefile /var/vm/sleepimage hibernatemode 是你的睡眠模式 0表示普通睡眠模式：内存数据不会写到hibernatefile文件，电力供应内存，一打开盖子就能马上工作。有一定的危险性，掉电内存中的数据就丢失了。 1表示休眠模式：即一合上盖子，所有数据都会写入hibernatefile文件中，并关闭电源，下次打开盖子是黑屏的，需要重新按电源键开机。 3默认方式安全睡眠模式： 一合上盖子，所有数据都会写入硬盘hibernatefile文件中，并同时不断电，电力一直供应内存，一打开盖子就可以马上工作。 算是 0和1的混合模式，即（安全睡眠） 修改为安全睡眠模式命令为： sudo pmset -a hibernatemode 3 2、重新启动，然后再尝试合盖子进入睡眠，问题应该解决了。

http://www.ruddwire.com/1017/tech/macbook-pro-turns-on-but-screen-stays-black-my-solution/#.VEb_kJO1ZNY

macbook pro turns on but screen stays black — my solution
Saturday, June 5, 2010 - 1:26 pm
By Colin
The Apple Macbook Pro would turn on, but the screen would not. The screen would stay black. I could tell the computer was on because when I hit the “caps lock” key, the green light on the key would turn on and off.

I fixed this the following way (this is basically resetting the Power Management Unit — PMU):

I disconnected the computer from the power cord, and from all other cables.

I held down the power button for several seconds to turn off the computer.

I let it sit 5 minutes.

I restarted the laptop while holding down the Shift key. This restarted the computer in Safe Mode, with the screen visible again.

After I logged in (in Safe Mode) to make sure everything was ok, I simply restarted the computer the normal way, and the screen behaved normally again.

If that doesn’t work for you, you could try these steps, documented at apple.com:

Holding down Command, Option, P, and R to reset your PRAM and NVRAM

Resetting PowerBook and iBook Power Management Unit (PMU)