Question New Laptop display behaving strangely, flashing lines across entire screen under some conditions

Aisolon

Honorable
Mar 10, 2015
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Good evening,

3 weeks ago i purchased a Lenovo Legion 5 17.
The specs are:
AMD Ryzen 5 5600H with Radeon Graphics
16,0GB Dual Channel Samsung DDR4 Ram @3200hz
LENOVO LNVNB161216 (FP6)
NVIDIA GeForce RTX 3060 Laptop GPU
I use the built in MUX switch to disable the integrated graphics and use the 3060 exclusively.



I started using it with its own display, then 2 days later I connected an external display with it and have been using that display exclusively ever since.
I only opened my laptop to press the power button, then closed it again.

View: https://www.youtube.com/watch?v=VLzGPjjlg5w

Today I disconnected all cables off my already running laptop to connect it to a rather old TV to watch a movie, then noticed some weird lines on the screen, but not always. On one window its completely fine, on the next the lines go crazy. Here is another video to demonstrate that.
View: https://www.youtube.com/watch?v=xHtSiXsVwiI

Neither the TV nor my external display are showing those lines, im sure my laptop display is to blame. I restarted my laptop several times, it didnt help.
This problem persists in games and videos.

Is there something I can try to fix this or should I contact Lenovo immediately?

Thanks for your time.


EDIT: 20 minutes after I put the laptop back to its former spot and connected all the cables again, I cannot reproduce the lines. I tried everything that always made them appear. My display seems fine.
EDIT2: Retried to disconnect all cables again only replugged the power cable, the issues came back instantly.
EDIT3: Simply gently rocking the display back and forth around the 90 degree angle will cause the issues to appear. An electrician friend of mine suggested a loose connection, either a cable not connected properly or a cold solder point.
 
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