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# Make sure you use the original HDMI port. If your desktop only has a VGA display port, there may be no video signal when you use <b>VGA to HDMI adapter</b>, and there is no way to solve this; However, you can try to lower the resolution and restart the PC to test, but the probability of success is very low.
# Change the HDMI cable to test.
# Test the X630 separately to check if there is HDMI output.(run the <code>ls /dev/video0</code> command, if you see anything such as '''/dev/video0''' other than file not found, then it’s available )
# Some laptops do not output any signal until you switch the output (usually via the FN + and an F5 key on the keyboard).
# Your computer maybe enter sleep mode, please exit sleep mode.
# If you're using something like '''NGINX Proxy Manager''', you must have '''Websockets Support enabled''' for it to work correctly – screenshots below:
[[File:Pikvm-websocket-enable.png]]
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