2017 MacBook Pro with flickering screen

Having just replaced the Logic board on my MacBook Pro (February 22, 2023), I am now 6 days out of warrantee and am experiencing flickering on the screen. It is dependent on the angle of the screen opening, and is not visible on my external monitor. I experienced this problem a few days after picking up the computer from Apple repair, but it was intermittent and didn't reoccur until yesterday. I am now reading that this is a result of the design? Planned obsolescence? Please weigh in....