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Screen flickering with horizontal and vertical lines

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HP all in one
Microsoft Windows 10 (64-bit)

Having problems with screen. Is flickering and almost mirror images. But is white on bottom of screen looks like mountains with vertical and horizontal lines going through it. 

Display is the same in BIOS. 

It passes screen diagnostic tests though.

HP Support Agent
HP Support Agent
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Message 2 of 2
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@pinarknlk Welcome to HP Community!


I understand that you are getting vertical and horizontal lines.


As you have stated that the lines appearing the BIOS as well.


The issue with a hardware part, I would suggest you contact our phone support and check for the support option. They will help you.


Or you can contact local service center for repair.


Here is how you can get in touch with phone support.

1)Click on this link -

2)Select the product type.

3)Enter the serial number of your device or select let HP detect your product option.

4)Select the country from the drop-down.

5)You should see the HP phone support number or Chat option listed.

We are experiencing longer than expected wait times to reach an agent due to the CoViD-19 impact and there might have been issues in you getting the expected resolution on the issue. 


Keep us posted,

If you would like to thank us for our efforts to help you, 

Give us a virtual high-five by clicking the 'Thumbs Up' icon below, followed by clicking on the "Accept as solution" on this post, 

Have a great day!

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