Mac Boot black Screen solution

Black screen issue on Boot

Mac book Pro is easy to bother to shut down, from years ago to now almost two months have not shut down the machine, but also open a bunch of programs, today shut down machine, this goods incredibly open machine, very depressed.

故障现象：  1. 开机有声音  2. 背面logo灯亮  3. 键盘背光灯不亮  4. 大写锁定键灯按下不亮  5. 屏幕有背光，无苹果logo，黑屏

Workaround: Successful boot after resetting pram

重置 PRAM (parameter RAM) 操作步骤：  1. 关闭 Mac  2. 在键盘上同时按下：Command(?)、Option、P 和 R  3. 启动 Mac  4. 出现灰屏前一直按住步骤2指定的键  5. 直到电脑重新启动，您会再次听到启动声  6. 松开这些键即可

If the above steps can already be turned on, the following will not have to try

重置 SMC/重置系统管理控制器步骤:  1. 关闭电脑  2. 将 MagSafe 电源适配器连接到电源和 Mac(如果未连接的话)  3. 在内建键盘上，同时按下 Shfit(左侧) + Control + Option键和电源按钮  4. 同时松开所有键和电源按钮  5. 按下电源按钮打开电脑  ==注：重置SMC时，MagSafe 电源适配器上的 LED 指示灯可能会更改状态或暂时关闭 ==

Mac Boot black Screen solution