I’m working on my girlfriends a1369 MacBook Air. It has been working fine aside from having the “service battery” message...

If it’s an error code p2015, It’s on the right side of the intake. There can be many reasons for it failing. It can be bad, jammed, gunked up with carbon inside the intake, broken actuator arm, etc. Make sure it’s moving correctly before replacing the sensor. Manually actuate it by hand.

It IS possible to get the screen off without breaking it, just take your time. I spent about an hour using the included picks along with the iopener.

That said, the adhesive is a bear to fully remove from the screen without marring it up.