Chosen Solution
Starting a new thread. New battery is in the MacBook Air. Put it in yesterday. In 12 hours has not charged the new battery. When I went to do a SMC reset and did shutdown, it rebooted on me twice without encouragement. Then I did power it down. Do the reset and it wouldn’t boot. Disconnected the power cord and it booted. Something is clearly wrong. How hard will it be to fix? I think this is something about a logic board? Thanks Annamarie Update (04/24/2018) The spontaneous reboot is not something I knew about. The battery is good. There’s something else wrong. (This is a new one I put in two days ago.) Here is the Coconut Battery
Update (04/24/2018) So now it won’t boot at all. Yesterday after I did the reset SMC it charged up nicely. I then did the battery calibration. It won’t boot this morning. Sigh. What next? Update (04/24/2018) Opened the case - did the disconnect battery thing. Closed case (I’m getting good at those tiny screws) . Tried to boot from battery. Nothing. Attached power cord - it booted without my holding down the power button. Booting wihtout holding down the button has been happening from the beginning of my trouble shooting. Coconut battery has the battery all green with 100% charge now. And in case this is relevant - I often have to jiggle the power connection to get the light on (in other words connected.)
You are causing a spontaneous reboot by disconnecting the battery and mag-safe then reattaching them. This is perfectly normal. Also, if a battery is to weak to boot a machine and the power on button has been pressed, it will boot up on its own as soon as the battery is charged up enough. Download and run Coconut Battery as Dan suggested so we have a better idea of what happening. https://www.coconut-flavour.com/coconutb… UPDATE That battery is fully charged. Disconnect the mag-safe let it run down. Test it with Coconut to see where it’s at. Pull in the mag-safe, then see if Coconut shows it to be charging. If it ain’t broke don’t fix it.
Annemaria - At this point its clear your battery issues have been resolved. Sadly, you still have something a miss here thats causing your system to fail to boot up. I’m suspecting your keyboard had something spilled into it. I would recommend you let the Apple Store take a look to see what they say.
