If the monitor keeps disconnecting and reconnecting or flashing through the HDMI port, the issue may be caused by the connected laptop, HDMI cable, monitor, or hub/dock itself. 

Here are some troubleshooting tips that may help you locate and resolve the problem.
 

For laptops:

• Try the device with a different laptop with a USB-C port and ensure that the C-port supports DP Alt Mode (display output) to see whether you can get a stable connection.

For HDMI cables:

• Verify that all devices are securely attached.
• Try the device with a different HDMI cable.
• If possible, plug your HDMI cable directly into your devices and see if you get a stable connection.

For monitors:

• Try the device with a different monitor.

For hubs/docks:

• Confirm whether the LED light is on when connected to a laptop;
• Try with a different hub/adapter to see whether you can get a display for your laptop.

If all of the steps above cannot help you locate and resolve the problem, please contact us for further assistance. Briefly mention the steps that you’ve already tried for a faster solution.