User Manual Q&AAnswer
Aug 13, 2025 - 12:32 AM
If you are experiencing no signal on the HDMI output of the SIIG 04-1403A USB-C to HDMI with LAN Hub and PD Charging Adapter, there are a few troubleshooting steps you can take:
1. Check USB-C Port Compatibility: Ensure that the USB-C port on your host device supports DisplayPort Alternate (DP Alt) mode. The adapter requires this mode to function properly.
2. Verify Power Delivery Support: Make sure that your laptop or tablet and the power adapter support PD 3.0 specification. If the power delivery is disconnected due to incompatible specifications, the adapter may not work as expected.
3. Resolution and Refresh Rate: Confirm that the resolution and refresh rate settings on your external monitor are compatible with the adapter's capabilities. The HDMI output supports a maximum resolution of 4K at 30Hz.
4. Cable Quality: Check the quality of the USB-C cable you are using to connect the adapter to your host device. Ensure that the cable supports E-Mark to enable charging over 60W.
5. Firmware Updates: Check if there are any firmware updates available for the adapter. Updating the firmware may resolve compatibility issues and improve performance.
If after following these steps, the HDMI output still does not produce a signal, you may need to contact SIIG support for further assistance.
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