Question

Weird Horizontal White Line On Screen Every 3 Seconds (8 Sec

I have an Asus x551Mav laptop. 3 days ago a weird white horizontal line start to appear across the screen. It shows up every 3 seconds and last for 2 seconds. First day appeared the problem only was for like 5 minutes then stopped happening, 2 days later last for half and hour and today is still happening when i woke up.
Here is the example, sorry bad quality https://youtu.be/6dF2KluDxdo

I connected the laptop to my samsung 32 led tv and the line doesnt show up there, i activated the duplicates screen and still the white line appear in LAPTOP but not in tv. Question is... this the fact discard driver issues and software issues in general? Do i have to replace the screen or is it a possibility that if i clean the cables between the motherboard and the screen it will fix it? BTW i start the PC in safe mode and the problem is still there. My original laptop is broken so i had to buy another one not from ASUS, dont know if that is related since i have read about powew issues.

I have Windows 10, Intel HD graphics and 4 gb ram. My original laptop is broken so i had to buy another one not from ASUS, dont know if that is related since i have read about powe issues.

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Comments
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Answer
Yes.
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Thanks

Thanks for answering and that link didnt you could find decent pcs so cheap. I know they are refurbished but still. I am going to try to open my pc to check if theres a broken cable or something, i have no warranty sadly.

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Answer
Laptop

If you just bought this thing look into your warranty.

Don't take it apart as that may void any warranty.

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Warranty

I bought it on Amazon in 2015 september. i dont think i still have warranty but i will look into it

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