HP Deskjet F4185 All-in-One Printer - Manual (Page 125)

For more information, see:
Communication problems over a USB connection
Communication test failed
Cause: The HP All-in-One is turned off.
Solution: Look at the On light located on the front of the HP All-in-One. If it is not
lit, the HP All-in-One is turned off. Make sure the power cord is firmly connected to
the HP All-in-One and plugged into a power outlet. Press the On button to turn on the
HP All-in-One.
Cause: The computer is not communicating with the HP All-in-One.
Solution: If the HP All-in-One is not properly connected to the computer,
communication errors can occur. Make sure the USB cable is connected to the HP All-
in-One and the computer as shown below.
For more information, see:
Communication problems over a USB connection
Improper shutdown
Cause: The last time the HP All-in-One was used, it was not turned off properly. If
the HP All-in-One is turned off by turning off the switch on a power strip or by using
a wall switch, the device can be damaged.
Solution: Press the On button located on the control panel of the HP All-in-One to
turn the device on and off.
Two-way communication lost
Cause: The HP All-in-One is turned off.
Solution: Look at the On light located on the front of the HP All-in-One. If it is not
lit, the HP All-in-One is turned off. Make sure the power cord is firmly connected to
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