Would anyone have an educated guess on what has messed up my screen, see below? During startup, the Apple logo shows almost normally with only few extra pixels on top of the logo and at the right end of screen. After that, it's just these lines. Weirdly, when waking up from sleep, the screen works normally for less than a second before the lines reappear. Already tried resetting SMC and NVRAM. External screen works fine. Cannot use recover mode as the picture is already gone crazy by the point the recovery menu appears.