Device Compatibility: USB-C hub not detecting HDMI
4.5
The hub works for USB ports but doesn't output video to a monitor.
Symptoms
- No signal on monitor
- Hub gets hot
- USB works, HDMI fails
Possible Causes
- Incompatible USB-C port
- Insufficient power
- Bad HDMI cable
Step-by-Step Fix
1
Check Port Specs
Ensure your laptop's USB-C port supports "DisplayPort Alt Mode".
2
Plug in Power
Many hubs require external power to drive an HDMI signal.
3
Try Different Cable
Test with a known working HDMI 2.0+ cable.
When to See a Technician
Not all USB-C ports are created equal; some are data-only and cannot output video.
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