Chosen Solution
I just got a MacBook Air 2015 and starting it up the screen flickers with varying degrees of brightness but after letting it sit for 2 minutes the flicking is gone and the screen is fine (moving the display position doesn’t affect it). Could this be a backlight issue or a simple loose display connection?
C - All of the above! The backlight power travels through the same cable as the displays signal. I’m sure your logic board display connector has an issue.
Follow this guide to get to the connection MacBook Air 13" Early 2015 Display Assembly Replacement Follow the first three steps, then jump to Step 19 & 20 Take some nice tight pics like mine and post them here for us to see Adding images to an existing question Update (04/10/2021) Good thing I didn’t put any money on that! Double check things using an external monitor, if it doesn’t have any issues then the other side connection or the cable its self has the issue. Often I find people who use a spray cleaner or let the cleaner drip gets to the electronics at the base of the lid damaging it there. You’ll need to follow this guide to get the display off MacBook Air 13" Early 2015 Display Assembly Replacement Carefully slide off the clutch cover and lift the bezel that surrounds the display (use a hair dryer to heat it up a bit to soften the adhesive). so you can gain access to the cable and the connector on the T-CON board. Inspect the cable hopefully you only need a new cable. Otherwise its a full lid assembly.
