Question Help diagnose laptop's display issues ?

psychobacter

Honorable
Jul 2, 2019
12
0
10,510
So whenever I turn on my laptop (Asus ROG Zephyrus M GU502GU) after it has been turned off for a couple of hours, the screen on my laptop starts displaying these weird lines (see links posted below). The screen remains black while the laptop is posting and only starts displaying something when the windows lock screen appears. The weird lines disappear after a few minutes and remain gone until I turn off the laptop and leave it for a couple of hours. If I turn off the laptop and restart immediately, these issues do not occur.

Sometimes I get screen flickering and dimming, but only when the aforementioned issues occur. This started happening 2-3 days ago, and I don't have any clue as to why. I haven't dropped my laptop or spilled something on it.

Please ignore the background noise in these videos
  1. Weird lines: https://streamable.com/0ms9kc
  2. Screen flickering and dimming: https://streamable.com/1yisd9
  3. Screen flickering and dimming 2: https://streamable.com/t2pavb
  4. Restarting laptop immediately after shutting it down: https://streamable.com/kw7mdx
  5. Black screen while posting: https://streamable.com/43wdxl