Hardware problem on the screen of my Acer Predator 300 I7 8gen

MrVailati

This post is an update of a question I asked some time ago on the screen of my Predator Helios 300. The problem, described in detail is the following: The screen of my laptop came with horizontal lines that would cover a large part of the screen, these they are arranged including a line of pixels every two pixels and appear and disappear in shells of 2 seconds if I have the monitor in 144hz and every 4 if I have it in 60hz. 

So far I have tried connecting an external monitor and this, in its different modes (30hz, 45hz, 60hz and 120hz) works perfect. I installed the latest graphics card drivers and nothing. I hope you can help me, at this time I am far away from the nearest technical service and I do not think I can take it to guarantee until next year.
Thanks.

This is the laptop:
www .amazon. com/dp/B07CTHLX8C/?coliid=I31014SON4H82M&colid=2MXXD93BM7DX3&psc=0&ref_=lv_vv_lig_dp_it

MrVailati

I think it's a hardware problem, but I do not dry anything yet