8. Proving the unit's functions - 'USB Connectivity to Computer?'
First of all check that the 'Presenter Control' button is lit on the front panel of the unit. If not, then depress the 'Presenter' button to turn it on.
Now when you connect the USB A-B lead from the unit to the USB port of the Computer you should hear the Computer make the 'ding-dong' sound of a USB device being connected.
If you don't hear the ding-dong sound then try another USB port on the Computer or try another Computer.