I have been using my USB3-HUB7-81X on my desktop for a few months now.
But as the devices I have used have always been plugged in, I have never used ports 2, 3 and 4.
Today I tried to move one of the devices to Port 2 and the device didn’t connect and no blue light. I tried ports 3 and 4 and they also don’t light up blue.
I tried putting the hub on another machine, and same problem with ports 2, 3 and 4.
I reconnected the hub to my current laptop and grabbed the firmware upgrade tool from your website. which shows what chipset and firmware I have. A screen capture is attached.
I think there are 2 entries because I disconnected and reconnected the hub from my pc.