the problem is with the interface language
if the user interface is not in the correct language
When you installed your scanner system, the wrong language was installed in the final step.
You need to change the interface language. See how do I change the scanner system interface language? on page 45.
the problem is with the touch screen
if you have problems pressing buttons on your screen
You need to
1.Press the Quit button 
and select Exit to exit your scanner software.
2.On the active desktop, select Calibrate Touch Screen
and follow the instructions provided.
Calibrate your touch screen from the same position in which you would use it when working with your scanner system. You need to do this because the angle at which you use your screen may affect performance.
hp designjet 815mfp & scanner 4200 | 53 |