Horizontal lines appearing on laptop display

[inf-1]

Horizontal lines flickers on my screen while I was browsing the web around a week ago. It seems to not appear on external displays connected to it.

Another thing I've noticed is that the lines reach to the bottom of the screen if I changed my refresh rate to 60 instead of 165.

Tried updating my gpu drivers, but it did not fix it either.

Is this a problem with the display cable connection to the motherboard?

I kind of want to open it up, however I have doubts on doing that since it still has its warranty active, and I wouldn't really want to risk it. Since I really need to have this fixed as soon as possible and sending it to be serviced might take a while.

Here it is on 165 refresh rate

and on 60

the lines extends and shortens erratically on both refresh rates.

[Treeko]

Hi @inf-1 

Welcome to HP Support Community. 

Thank you for posting your query, I will be glad to help you. 

I see that you are facing issue.

I've sent you a private message with the instructions. In order to access your private messages, click the private message icon on the upper right corner of your HP Support Community profile, next to your profile Name or simply click on this link

I hope this helps.

Take care and have a good day.

Treeko

HP Support