Display issue

[Jacquelinem28]

Hi I’m reaching out because my HP is having display issues. Can you please assist? 

[BeemerBiker]

Check to see if there is a hardware problem: Watch this video.

Tap the ESC key after powering on. Tap it once a second after you see the LEDs on the keyboard flash. When you see the startup menu, press F2 to run diagnostics.

If a component (display)  fails during the UEFI test then Click here to check warranty

See if you can identify which category your problem falls in.
I also need your product ID if laptop or model name if an external monitor

Different types of screen problems shown using google images


card problems show artifacts

Display problems due to backlight failures

General display problem: monitor or GPU

Flickering indicate the
driver needs to be updated.

Problems caused by room lighting

Glare is reflections of items: 10 ways to reduce glare

Adaptive lighting problems: brightness auto adjust not working
1 - turn off or on auto adjust
2 - For external monitor try the On Screen Display menu.

Problem with pin 20 of display port cable
You might want to read the response by BrightOfLife about pin 20
https://www.reddit.com/r/Monitors/comments/y0z0zm/lg_monitors_and_deep_sleep_issue_still_a_thing_lg/

Pin 20 problem according to Google.

Discussion at AMD about the pin 20 problem and one of their video boards.

Let me know what you find out.