On the Digitech website this monitor is referred to as "P2423EN" but such a model does not seem to exist (the code is incompatible with DELL's monitors naming) and the reviews below refer to model "P2423DE". Is it possible that the item's name has been mispelled?

The USB ports on the monitor do not work for me. I also find it strange that this monitor does not require an extra power cable to be connected to supply the USB ports with power. Maybe you have to make a setting in the menu for them to work? Please help.