What did you use to dust it off? Canned air can cause liquid damage, compressed air can have water in the line or be too strong. A vacuum can give of a static discharge. I use an electric blower, and a tooth brush.
+
+
=== Update (12/27/2017) ===
+
+
Also try unplugging the laptop and removing the battery and holding the power button down to discharge the electricity.
What did you use to dust it off? Canned air can cause liquid damage, compressed air can have water in the line or be too strong. A vacuum can give of a static discharge. I use an electric blower, and a tooth brush.