MacBook Keyboard malfunctioning

Today's MacBook Pro keyboard and trackpad suddenly malfunction, the keyboard's switch key does not malfunction.

Step 1. Resetting the Power connection status
first shut down , then connected to the power supply, (the connected peripherals are unplugged), while holding down the "shift+control+option+ on/Off" The four keys, about 10 seconds, observe the power indicator.
If the power LED does not change color, it indicates that the hardware is normal.

Step 2. Clean up the cache
While holding down the "option+command+ letter r+ Letter P" Four keys, press and hold, wait for the power on the sound four times , you can release.

After this operation, the keyboard and mouse will be available.

This article is from the "GONE with the Wind" blog, please be sure to keep this source http://h2appy.blog.51cto.com/609721/1910216

MacBook Keyboard malfunctioning