EliteBook 830 G7 – USB-C video stopped working (powers monitor but “no display”) on Windows 11 24H2

[Lysosome]

Model/OS

• HP EliteBook 830 G7 (227H4UP)

• Windows 11 24H2 (build 26100.6899)

• BIOS version: S70 01.22.00 (updated to latest)

• Intel GPU driver version: 31.0.101.2135

Symptoms

• Both USB-C/Thunderbolt ports power on external monitors but Windows does not detect a display.

• Same monitor + USB-C cable work fine on another laptop.

• Same ports transfer data to a USB-C SSD fine.

• Laptop HDMI port works with the monitor.

• Symptoms started suddenly a few weeks ago (~beginning of Oct 2025). It worked intermittently once last week, then stopped again.

Notable clue

• HP BIOS/SoftPaq shows Intel Thunderbolt Controller version 0.0.0.1; package says latest 62.1.2.1. Re-running after BIOS update still shows 0.0.0.1.

What I’ve already tried

1. Hard reset (power off, unplug AC/devices, hold power 30–60s).

2. Tested both USB-C ports; HDMI works. Win+Ctrl+Shift+B and Win+P.

3. Device Manager: uninstalled UCM-UCSI ACPI Device, let Windows reinstall. Unable to find any Thunderbolt branded device under "System devices" section.

4. Reinstalled in this order (with reboots): latest BIOS, Intel Thunderbolt 3 Driver (HP-posted builds from official downloads page).

5. Thunderbolt Control Center installed; controller does not present a usable NVM version.

6. HP Image Assistant ran to completion; no remaining recommended updates.

Request

• Is there a known issue where the Thunderbolt controller fails to enumerate (NVM shows 0.0.0.1) causing DP Alt-Mode to fail while USB data still works?

• How can I force the Thunderbolt NVM to update on the 830 G7 (62.x) if the updater keeps reporting 0.0.0.1?

• Any service advisories or field fix (controller/board replacement) for this exact symptom?

Happy to provide logs, exact SoftPaq IDs, and screenshots. Thanks!

[Lysosome · Accepted solution]

Update: Yesterday my laptop wasn't responding so I had to hard power off by holding down the power button for 10-15 seconds. When I powered back on, the battery icon in my bottom toolbar had slightly changed (it's now slightly longer and has yellow/red colors when on low battery as opposed to monochrome before). More importantly, I found that USB-C video suddenly worked again. I'm not sure exactly what happened, but I'm guessing some software patch kicked in. I noticed two differences compared with my broken state before:

1. I'm now on Windows 11 Pro 24HS OS Build 26100.7171
2. When I go into HP softpaq installer, it properly shows the current version of Intel (R) Thunderbolt Controller to be 62.1.2.1