MacBook Air comes on and shuts down
Hi I have a problem with my early 2014 Macbook Air.
Using it on battery it comes on, and (intermittently) immediately shuts down, or at least the screen goes dark. Then when I connect the power cord, and press the power button, it comes back. (It just comes back on, it doesn't boot up fromstart again). The thing is if I then take the charger out it will stay on, normally for the rest of that session. The battery indicator shows the correct charge. My local repairer has replaced the logic board, power board and battery. If anybody has any ideas I would be grateful. Thank you