If you have a fault light on a HUE-800S Ethernet Rail Switch, you need to see if PWR1 and PWR2 lights (or LEDs) are illuminated. If one is not, then you need to bridge PWR1 and PWR2.
Thanks to the HUE-800S Manual, I discovered that the electricians hired to do the configuration missed this vital part so I was no longer being blamed for physically damaging the HUE-800S Ethernet Rail Switch or making Ethernet cables by hand improperly in the building to cause the fault light issue.
Unfortunately, I had to waste 2 hours tracing CAT6 cables over a 6-story building but since it was not my error, the client got billed for the work.
