SLZB-06M not powering on

My SLZB-06M is no longer working. It was working for the past 6 months until last week when it started powering off intermittently. Now it has stopped powering on.

-There are no lights on it when plugged into a PoE ethernet port #3. My switch also does not see this on the network and lists it as “disconnected.” I have tried plugging it into port 4 on my switch, which works with another device, and have used a different ethernet cable, and it still does not power on. I also confirmed that the ethernet cable and port #3 used by the SLZB-06M work by connecting another device to them, which powered on fine. This shows the issue is not the ethernet wire or the port.

-I have been using a statis IP address for the HA host and SLZB-06.

-If I plug a USB-C cable into the device, the yellow light turns on showing it is connected to a power source. The device does not send information, however, and it is still listed as disconnected in my switch.

-If I plug a USB-C cable into my computer, I do hear a sound that it has connected. However, I do not see it in windows explorer as a connected device.

In home assistant, I get this message “Zigbee2MQTT The add-on seems to not be ready, it might still be starting. Do you want to try again?”. and 502: Bad gateway. When I try to access the IP address of the SLZB-06M in my browser, it does not load.

Did you upgrade it recently? I’ve seen quite a few posts here over the last couple of months where the coordinator switched back to usb mode

I did upgrade it, but I pressed the button on the device to make sure it was not in USB mode.