HP deskjet 990c Guide De Référence Rapide page 20

what is the problem?
When I connect a USB cable
between the printer and my
computer, an "Unknown
Device" message appears.
possible causes...
• Static electricity has built up in the cable
between the printer and your computer
• You may have a defective USB cable
to solve the problem...
1. Disconnect the USB cable from the printer.
Unplug the printer from its power cord.
2.
3. Wait approximately 30 seconds.
Plug the printer cord into the printer.
4.
Plug the USB cable into the printer.
5.
6. Replace the USB cable or use a parallel
cable if "Unknown Device" continues to
appear in the New Hardware Found dialog
box.
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