Cant duplicate screen for presentation

Start by connecting the TV directly, selecting its correct input, and using Windows key + P → Duplicate; if Windows still cannot detect it, isolate the cable or connection before changing the graphics driver.

1. Check the connection and detect the TV

1. Disconnect docks, dongles, and other display adapters temporarily. Connect the laptop directly to the TV.
2. If using HDMI or another wired connection:
   • Reseat the cable at both ends.
   • Select the corresponding HDMI/VGA/DisplayPort input on the TV.
   • If possible, test another cable or TV input.
3. Press Windows key + P, then select Duplicate.
4. Open Start → Settings → System → Display → Multiple displays → Detect. The TV should appear as a second numbered display. ^1^
5. If it remains undetected, test:
   • This TV and cable with another computer.
   • This laptop with another TV or monitor.

These tests distinguish a Windows/driver problem from a failed cable, TV input, or laptop video port. Microsoft recommends direct connection, another cable, another video port, and testing the display with another system. ^2^

For a wireless connection instead: open Start → Settings → System → Display → Connect to a wireless display, and select the TV or wireless adapter. ^1^

2. Reset the graphics driver

Because this was an existing setup that stopped working, press:

Windows key + Ctrl + Shift + B

The screen may blink while Windows resets the graphics driver. Reconnect the TV and retry Windows key + P → Duplicate. If that does not help, restart normally through Start → Power → Restart. ^2^

3. Roll back the display driver

If the issue began after an update:

1. Search for and open Device Manager.
2. Expand Display adapters.
3. Right-click the graphics adapter and select Properties.
4. Open the Driver tab.
5. Select Roll Back Driver, complete the prompts, and restart.
6. Reconnect the TV and select Windows key + P → Duplicate.

Microsoft specifically recommends rolling back the display driver when external-display problems occur after an update. ^2^

4. If Roll Back Driver is unavailable

Reinstall the driver:

1. In Device Manager → Display adapters, right-click the graphics adapter.
2. Select Uninstall device.
3. Select Attempt to remove the driver for this device if that checkbox appears, then select Uninstall. If it does not appear, continue with Uninstall.
4. Restart the laptop.
5. Return to Device Manager → Display adapters.
6. Right-click the adapter → Update driver → Search automatically for updated driver software. ^2^

If another display works but the TV does not, investigate the TV input or compatibility. If no external display works after driver recovery, the laptop manufacturer or a repair technician should inspect the video port or graphics hardware.

Windows 10 support status

Windows 10 support ended on October 14, 2025. Microsoft no longer provides normal free security fixes, software updates, or technical assistance for Windows 10. If the laptop supports Windows 11, upgrading is recommended. ^1^

If the problem remains reproducible after the hardware and driver tests, report it through Feedback Hub with the update date, laptop/graphics-adapter model, TV connection type, and reproduction steps. Feedback Hub reports a possible Windows bug; it is not an individual repair or support channel. ^2^

References

1. Windows 10
2. Troubleshoot external monitor connections in Windows | Microsoft Support