Is power reaching the device?
If you are using a power strip, make sure that the power strip is turned on. Or, try plugging
the device directly into the power outlet.
Test the power outlet to make sure that it is working.
If you have plugged the device into a switched outlet, make sure that the switch is on.
Make sure that the power is turned on.
If the problem persists after you try the preceding remedies, the device might be experiencing a
mechanical failure. Unplug the device from the power outlet and contact HP. See the support
flyer that came with the device for information about contacting HP.
Chapter 8 Troubleshooting
The device control panel display has black lines or dots, or
Static electricity can cause unexpected black lines or dots to appear on the device control
panel display. Do not touch the device control panel display if there is a chance that you have
collected a static electric charge (for example, by walking on carpet in a low-humidity
Was the device exposed to an electric or magnetic field?
Unexpected lines or dots might appear on the device control panel display, or the display
might become blank if the device is exposed to an electric or magnetic field. To resolve this
problem, perform the following procedure:
1. Turn the device off.
2. Remove the device from the electric or magnetic field.
3. Turn the device on again.