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Strix G731GW, black horizontal lines at the bottom of the screen

Level 7
Hello and thank you for helping me.
I have black horizontal lines at the bottom of the screen. The first time they appeared was after closing a certain game.
They DO NOT appear in screenshots.
They DO appear in safe mode.
They DO appear in bios menu.
They DO appear in clean boot.
They DO NOT appear in other displays using hdmi
However, this will get complicated a bit: Changing the refresh rate from 240hz to 60hz then back to 240hz clears the lines for the 240hz, but only if the 60hz had the lines. However it is not a true solution, because turning off the screen or putting the laptop to sleep, brings the lines back.
Turning off the screen at 60hz removes the lines if they exist, or bring them back if they don't (kind of like a switch).
The only weird solution I found is to switch from 240hz to 60hz, then turn off the screen if the lines aren't there, then once I have the lines back, switch back to 240hz. I don't think it is hardware related due to this weird temporary fix.
(everything bios, windows, apps, drivers are up to date)
OS: Windows 10 64bit
Bios: G731GW.308
Edit: Update: The previous solution works rarely now, however turning off the laptop while using 240hz and then turning it on again, clears the lines (must be a shut down then start up, cuz reboot didn't solve it)
Video upload:

Level 10
Hi there,
How is everything ?
Please kindly send the device to service center if you still have the issue.
The panel and cable need to be further examined.
Thank you.

Hey, thank you for your reply
I live in Tunisia, which service center would be closer to me?

Hi there, you know what , I have the same issue, but is kind of Has been eating pixel by pixel , line by line one month ago , and still doing the same, when I anplug the charger lines disappear, but if i connect it...start eating the pixel of my screen...

This can help you

Horizontal lines on laptop screen Fix, Solve it within few minutes

I was facing this issue because of software problem so i solved it.

If the problem is because of software then you can solve it 

You can try some troubleshooting i have mentioned the article you can follow it and solve your problem.

If the problem is because of any hardware issue then you have to replace the display.

Level 10
Hello Gustav,
Do you have G731GW as well?
and may I know your BIOS and display driver version?
Thank you.

I have exactly the same problem. Sometimes it disappears after awakening from sleep mode.
It looks like a driver issue but I'm not really sure.

Any solution?

Blake@ROG wrote:
Hello Gustav,
Do you have G731GW as well?
and may I know your BIOS and display driver version?
Thank you.

I have G531GT
BIOS VERSION/DATE American megatrends inc g531gt-308 1/02/2021
simbios version 3.2

directx runtime vesrion 12.0
driver version 457.63

Customer Service Agent
Hi aegean,

Do you also have G731GW?
May I have your BIOS and display driver version?
Thank you.

do you find any solution for this problem (same laptop)