At least in my case, these lines only appear after a while (~30 min or more). If I shutdown the computer and turn it back on right after, lines will still be there. However, if I wait a couple minutes before turning it back on, they won’t be there. The angle of the display doesn’t matter at all. Leaving the macbook on for long periods of time does make the problem worse. In this case, lines get darker and sometimes appear at the bottom as well. Ventilation seems to be working just fine and I can hear the fans kicking in during intensive tasks. Today when the lines appeared I placed my macbook in front of an AC unit and the lines faded slowly, so the problem is most likely heat related.
=== Update (04/09/2019) ===
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Well, in my case the problem solved itself (knock on wood). It's been more than a month since the lines last appeared. The only thing different that I did was to ditch the external monitor. Nothing else. Let's see how long this lasts. Got a quote for R$3500 to replace the display in an authorised service provider, but wasn't entirely sure the display was to blame so I didn't go ahead with the repair.
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Well, in my case the problem solved itself (knock on wood). It's been more than a month since the lines last appeared. The only thing different that I did was to ditch the external monitor. Nothing else. Let's see how long this lasts. Got a quote for R$3500 to replace the display in an authorised service provider, but wasn't entirely sure the display was to blame so I didn't go ahead with the repair.
At least in my case, these lines only appear after a while (~30 min or more). If I shutdown the computer and turn it back on right after, lines will still be there. However, if I wait a couple minutes before turning it back on, they won’t be there. The angle of the display doesn’t matter at all. Leaving the macbook on for long periods of time does make the problem worse. In this case, lines get darker and sometimes appear at the bottom as well. Ventilation seems to be working just fine and I can hear the fans kicking in during intensive tasks. Today when the lines appeared I placed my macbook in front of an AC unit and the lines faded slowly, so the problem is most likely heat related.
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=== Update (04/09/2019) ===
+
+
Well, in my case the problem solved itself (knock on wood). It's been more than a month since the lines last appeared. The only thing different that I did was to ditch the external monitor. Nothing else. Let's see how long this lasts. Got a quote for R$3500 to replace the display in an authorised service provider, but wasn't entirely sure the display was to blame so I didn't go ahead with the repair.
Recorded my display misbehaving today:
https://www.youtube.com/watch?v=p6FficHt0VM&feature=youtu.be
At least in my case, these lines only appear after a while (~30 min or more). If I shutdown the computer and turn it back on right after, lines will still be there. However, if I wait a couple minutes before turning it back on, they won’t be there. The angle of the display doesn’t matter at all. Leaving the macbook on for long periods of time does make the problem worse. In this case, lines get darker and sometimes appear at the bottom as well. Ventilation seems to be working just fine and I can hear the fans kicking in during intensive tasks. Today when the lines appeared I placed my macbook in front of an AC unit and the lines faded slowly, so the problem is most likely heat related.