Hi Chony
The power supply that comes with a USB hub is designed to provide full power to all the sockets regardless; therefore it looks like there is a fault with the USB Hub or power supply.
As mentioned above some items (That don’t have their own power supply) will need 2 USB connections to work.
Please note: with the cheaper USB Hubs all the ports are linked together, not isolated, therefore if you plug a USB 1 device in, then all the ports become USB 1, so make sure it can run USB 1 & 2 simultaneously with no speed loss.
Hope this helps
Bill
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