Try a cold reset of your printer
Use the following procedure to perform a cold reset.
1. Turn off the printer.
2. Press and hold the Go button.
3. Turn the printer on, and continue to hold the Go button for at least 5 seconds, but not longer than 15 seconds. During this process, the Attention LED turns on.
4. Release the Go button.
NOTE If both the Attention and the Ready LEDs turn on before you release the Go button, you must start the procedure again with step 1.
The printer's LEDs begin cycling. The cold-reset process runs until completion, and the printer
returns to the ready state.
'A cold reset changes most system parameters in NVRAM to the factory defaults. A cold reset does not reset the page count, the paper tray sizes, language, or formatter number.
NOTE A cold reset also resets all the HP Jetdirect settings as well as the printer settings.'