Horizontal Lines Issue on Acer Nitro 5 (AN515-55)

Hey everyone,
I bought this Acer Nitro 5 (AN515-55) laptop 6 months ago. Now I have this strange issue which is driving me nuts!

https://i.imgur.com/ZrhgeEJ.jpg

https://i.imgur.com/D3XUMTg.jpg

Everything seems fine when I switch the laptop on at the beginning of the day. Then these horizontal lines begin to appear as time goes by. The flickering-horizontal lines gradually rises about top line of the taskbar and stays as it is. I thought that this somehow should related with temperature. So one day I decided to play some challenging games (GTA V, Cyberpunk 2077 etc..) a while to see how worse it could be. Then I noticed that the line count began to decrease by themselves while I playing. Next day, I switched off the laptop when the lines came back and they were gone when I switch it on again after about 30 minutes. Lines are increasing and decreasing occasionally so to speak. I also tried to play with the flex cable that is attached to the motherboard with no luck.

I guess this isn't related with any software issue as same thing also happens on the BIOS screen (and the display is fine on TV).

I don't want to send it to Acer service because there are no repair center where I live and I don't have the time to wait my laptop to come back. How can I identify the source of the issue?

Thanks.

//Edited the content to add model name.

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brummyfan2

Hi,
You could try connecting to an external monitor/TV with HDMI cable and check whether you get the lines in it as well, also try reinstalling the display adapter driver from Acer support site for both Intel and NVIDIA(if you have).
Acer support site may be down at the moment but try latter.
Product Support | Acer United Kingdom

KyloRen

brummyfan2 said:

Hi,
You could try connecting to an external monitor/TV with HDMI cable and check whether you get the lines in it as well, also try reinstalling the display adapter driver from Acer support site for both Intel and NVIDIA(if you have).
Acer support site may be down at the moment but try latter.
Product Support | Acer United Kingdom

Thanks for the response! But:

I guess this isn't related with any software issue as same thing also happens on the BIOS screen (and the display is fine on TV).

brummyfan2

If there's no lines in external display, you may have a loose display cable or you may need a new panel, I would suggest you reseating the cable and see whether it fixes the problem but you may void warranty by opening up the panel.

Easwar

Hi KyloRen,

It looks like hardware issue. Contact acer tech support,

https://www.acer.com/ac/tr/TR/content/service-contact

OR book the unit for repair service,

http://customercare.acer-euro.com/CustomerSelfService/CaseBooking.aspx?CID=TR&LID=TUR&OP=1

KyloRen

Thanks for all the answers.

I switched the refresh rate from 144Hz to 60Hz and this is the result:

https://i.imgur.com/EAD38Gb.jpg

So I presume the LCD panel is faulty. What do you think?