HP Photosmart C4380 All-in-One Printer - Manual (Page 151)

Solution: If the HP All-in-One is not properly connected to the computer,
communication errors can occur. Make sure the USB cable is securely connected to
the HP All-in-One and the computer, as shown below.
For more information, see:
“Communication problems over a USB connection” on page 91
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 button located on the top 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 HP All-in-One is not connected to the computer.
Chapter 13
150 Troubleshooting
T
roub
les
hoot
ing