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Intermittent issue where lower left screen flickers with some grey shadows showing, comes and goes. Please see pic - any help appreciated. Thanks.
We call this effect stage lighting. The 2016 & 2017 13” MacBook Pro models had a bad case of it and Apple finally had a recall ‘FlexGate’ Things a very different here! In your case you likely had a liquid spill or sat your system down on a wet surface. The LVDS cable connection on the logic board has corrosion damage and/or the logic board its self around the backlight driver has damage. The last area this might be damaged is within the display assembly, here some cleaning liquid dripped down to the edge where the LED’s are mounted. This will require the replacement of the full display assembly. Basically, you have a a few strings of LED’s which are inter-woven (Odd & Even) one of these strands power feed has been damaged so what you see is the shadow of the LED that is not lit. Review this guide MacBook Air 13" Mid 2013 Display Assembly Replacement. Jump down to Step 19, disconnect the connector (after first disconnecting the battery) do you see any damage either inside or around it?
