Constant shut down prompt if I don't use my mac every 5 seconds.
I have a 2015 macbook air 11" that i hadn't turned on since July, all was great till today, i plug it in, turn it back on, and it shuts down.
Only after resetting pram, vram and SMC did i get to boot up to log screen but, if I don't move or press a key in less than 5 seconds, i get a shutdown prompt, and then it shuts down.
I've never seen something like this, what can i do??? Battery is in good health and it was running great back in July.
I already started downloading the latest OS available for it, what else can it be?
MacBook Air 11″, macOS 10.13