Fuzzy and flickering screen
First it would turn on and now why do I have fuzzy flickering screen on MacBook Air.
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1. Update the software on your Mac,
Update may come with bug fixes.
https://support.apple.com/en-us/HT201541
2. Reset PRAM: Reset NVRAM or PRAM on your Mac - Apple Support
Settings that can be stored in NVRAM include sound volume, display resolution, startup-disk selection, time zone,
and recent kernel panic information.
The settings stored in NVRAM depend on your Mac and the devices that you're using with your Mac.
3. Startup in Safe mode. https://support.apple.com/en-gb/HT201262
To leave Safe Mode, choose “Restart” at the bottom.
Quote:
Safe mode prevents your Mac from loading certain software when it starts up, including login items,
system extensions not required by macOS,
and fonts not installed by macOS. It also does a basic check of your startup disk,
similar to using First Aid in Disk Utility.
And it deletes some system caches, including font caches and the kernel cache,
which will be created again automatically as needed.
4. Display
Even though this article is mainly about external displays, please try some of those steps.
https://support.apple.com/guide/mac-help/if-your-display-doesnt-look-right-mchlp2906/mac
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