Water enter my keyboard
I was watching video in my macbook and then the water split in my keyboard
the screen was normal and then start to blink and then half of screen become black and then the whole screen is black!!
MacBook Air 13″, macOS 10.13
Time for a repair or replacement, then.
Contact Apple Support, and discuss your options and alternatives: Get Support
If you have AppleCare+, Apple can potentially offer to repair or replace accidental damage for a fee, depending on the degree of damage involved. AppleCare Products - Mac - Apple
