Video signal via USB C stopped working (DP alt mode) HP Omen 17

[KarolSl]

Hi,

HP Omen 17 ck-1440nw

Windows 11

I have external display which was working fine for about 2 weeks.

Yesterday It stopped getting video signal via USB C port.

Tested on different laptop - It's OK.

Different display via USB C - also not working.

I did:

- CMOS reset

- BIOS / Tunderbolt drivers re-install

- Crtl+win+shift+B? (display driver reset)

Any ideas how to deal with it?

[Deep_World]

Hi @KarolSl,

Welcome to the HP Support Community!

Thanks for reaching out!

We're thrilled to have the opportunity to assist you and provide a solution.

Sorry for the inconvenience caused don’t worry let me help you.

To better understand the issue, could you please provide a few more details?

1. Does the USB-C port work for charging or data transfer, or is it completely unresponsive?
2. Are you using a Thunderbolt-certified cable or just a standard USB-C cable?
3. Did the issue start after a Windows update, driver update, or BIOS update?
4. Can you confirm the external display works on the same laptop via HDMI or DisplayPort?

Troubleshooting steps to try

1. Check Thunderbolt / USB-C security settings in BIOS

• Enter BIOS (F10 at startup)
• Look for Thunderbolt Security Level or USB-C / DisplayPort settings
• Try setting the security to No Security / User Authorization and test again.

2. Reinstall graphics drivers

• Go to Device Manager → Display adapters
• Right-click your GPU → Uninstall device
• Reboot and reinstall the latest drivers from HP Support or directly from NVIDIA/Intel.

3. Update Thunderbolt firmware

• Sometimes the Thunderbolt controller firmware needs to match the BIOS and Windows updates.
• Check HP Support for the latest Thunderbolt driver and firmware for your Omen 17 ck-1440nw.

4. Test alternate USB-C ports (if available)

• Some Omen models have multiple USB-C ports try another port that supports DisplayPort Alt Mode / Thunderbolt.

5. Power cycle the laptop and display

• Turn off both the laptop and external display, unplug everything, wait 1–2 minutes, then reconnect and power on.

I hope this helps.

I'm glad I could help! 😊 If this resolved your issue, please mark it as "Accepted Solution" and click "Yes" on "Was this reply helpful?" Your feedback not only keeps us going but also helps others find the solution faster! 

Take care and have an amazing day ahead! 

Best regards,

Deep_World