purple and green screen

[sechan903]

My DESKTOP  HP 27wm 27-inch  MONITOR has purple and green horizontal lines coursing top to bottom for several minutes each time the display "wakes up", and ends in a screen with a purple hue, darker from left to right sides. Issues are progressively worsening. 

[Hawks_Eye]

Hi @sechan903 

Welcome to the HP Support Community! We're here to help you get back up and running.

I’m sorry to hear about the persistent purple and green lines appearing on your HP 27wm monitor, especially since it affects your display each time it wakes up and seems to be worsening over time. 

That kind of visual disturbance can be really distracting and disruptive.

Let’s explore some steps that may help improve or resolve the display issue.

1. Check Cable Connections

Ensure the video cable (HDMI or DisplayPort) connecting your monitor to the PC is securely plugged in at both ends.

Try disconnecting and reconnecting the cable.

If possible, test with a different cable to rule out cable damage.

 

2. Test with Another Device or Port

Connect the monitor to a different computer or laptop to see if the issue persists.

Alternatively, try a different video output port on your PC.

This helps isolate whether the problem lies with the monitor or the computer’s graphics output.

 

3. Update or Reinstall Graphics Drivers

On your Windows 11 desktop, update your graphics drivers:

Open Device Manager.

Expand Display adapters.

Right-click your graphics device and select Update driver.

Choose Search automatically for drivers or visit the GPU manufacturer’s website (NVIDIA, AMD, or Intel) to download the latest driver.

 

4. Adjust Monitor Settings

Use the monitor’s on-screen display menu to reset settings to factory defaults.

Sometimes color calibration or picture modes can cause color tint issues.

 

5. Allow the Monitor to Warm Up

Some monitors can display color shifts when cold; leaving it on for a few minutes may allow it to stabilize.

Since the issue worsens, this is less likely the full cause, but worth noting.

Thank you for your patience with this display problem. Taking these steps often clarifies whether the issue is fixable through simple adjustments or requires professional service. If you need further guidance, please feel free to share any additional details.

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Take care, and have an amazing day!

Regards, 

Hawks_Eye