Dual monitor resolution problem

[mjw72652]

I have two HP laptops, a 15-da0053wm and a 15-bs234wm. Both are running Win 10 20H2, the da through a complete reinstall, and the bs through an in place upgrade. I did the clean install on the da to solve some issues with windows that the in-place upgrade I did on it failed to solve.

Both are connected to the same Westinghouse 43" smart TV on separate HDMI inputs with separate HDMI cables. Prior to the clean install on the da, both worked perfectly to mirror the screen on the TV.

Since the clean install, the every time I turn on the dual monitor setup on the da it changes my laptop screen resolution to 1360 x 768 instead of 1366 x 768. I get two wide black vertical borders, one on each edge of the screen. The resolution in Win 10 settings changes to 1360 instead of 1366, and I cannot change it back. As soon as I turn off the dual monitor feed and go back to single screen, the resolution automatically changes back to 1366. This didn't happen before the complete re-install.

Does anyone have any ideas?

[praveenbv]

Hi@mjw72652, Welcome to the HP Support Community!

Try these steps -

Search for and open Display settings. You can also right-click the desktop and open Display settings. Scroll down and click Advanced display settings. In the Display adapter properties, click Display adapter properties.

Click on the Monitor tab to adjust the Screen Refresh Rate from the drop-down menu. 

If the issue still persists, try re-installing the driver - 

1) In the search box on the taskbar, type Device Manager, and then select Device Manager from the list of results.
2) In Device Manager, expand Display Adapter. 
3) Right-click on the Display Adapter, and then select Uninstall device > Delete the driver software for this device check box > Uninstall.
4) Restart the computer. 

Also, try updating the computer using these steps -

Step 1 Windows Updates - 

1) In the search box, type and open Windows Updates. 
2) Check for updates. 
3) If the updates are available, click on install and restart the computer. 

Step 2 HP Support Assistant Updates - 

1) In the search box, type and open HP Support Assistant. 
2) Check for updates. 
3) If the updates are available, click on install and restart the computer.  

Hope this helps! Keep me posted. 

Hope this helps! Keep me posted. 

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