MacBook Pro Mid 2012 briefly displays static after waking from sleep
I've had this issue many times over the years. It's kind of like the video ram gets clogged in a way. I've solved it with a PRAM reset. Restart and before the computer actually starts up hold down Option, Command (⌘), P, and R till you hear the second startup chime. Then release the keys. This should take care of that for a while. If you get it again you can look into a SMC Reset which is a bit more complicated