Chapter 2: Using the HCO 31
a. For more information about types of messages, see the
D640 User Manual.
HCO not ready
1. Verify the following:
l
the HCO interface cable is connected to
the printer.
l
the HCO’s power cable is plugged into a
working power outlet.
l
The HCO’s power switch is on.
2. Press clear.
If the error message returns, cycle power on
the printer and HCO. The HCO takes a few
seconds to perform power-up diagnostics.
3. If the error message returns, call your HP
service representative.
Call engineer message:
Stops the printer and
takes it offline.
HCO Messages
Message
Remedy
Message type
a