What should I do if a USB port on the docking station stops working?
A USB port may be disabled if a connected device is incompatible with the docking station's power specifications and draws too much power. To reset the port, disconnect the device that caused the port to shut down, then unplug the power cable from the docking station and reconnect it, or disconnect and reconnect the docking station from the computer. (Page 20)
From the official HP Laserjet Pro Mfp M426fdw manual, page 20
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