Horizontal Lines on Screen, Screen fine on 240hz but flickers and glitches at 60hz

Hi everyone,

I have a ROG M15 Zephyrus laptop and it's been working great so far. Specs below:

- Windows 10 Home 10.0.19045 - 16 GB RAM - Graphics Card: NVIDIA RTX 2070 - CPU:Intel i7-10750H

However, I've been experiencing a bunch of visual bugs and glitches such as:

- Horizontal lines go from one side of the screen to the other. This shows up on the start screen and what I think is the BIOs. - The screen is fine on 240hz but when I lower it to 60hz, it starts flickering like crazy and the colors stretch/become distorted.

This all started one day when I plugged my laptop into the TV via HDMI cable. I'd done this before with the same TV and cable so I'm not sure what happened here.

Stuff I've tried:

- Update graphics card drivers - Lower the refresh rate. This is how I found out that it goes nuts on 60hz - Turn off the 3ms overdrive setting - Change the NVidia settings to be on max performance. - Restart the laptop multiple times/leave it off over night in case this was an overheating issue.

I know that it's most likely a hardware issue and I'll have to get it checked out by an actual repair center, but I was wondering if anyone had any other ideas/suggestions on what to do.