Patent ID: 8410788

Claim:
A method of diagnosing an electronic display device ( 1 ) having a screen ( 3 ) and a graphics memory ( 2 ) in which image data ( 14 ), either a displayed image or an image to be displayed on the screen ( 3 ), being one of stored and changed, the method comprising the steps of: switching on a certain number of pixels of a concealed region ( 11 ) of the screen ( 3 ); measuring a value to yield a measured value ( 15 ) characterizing either current consumption or change in current consumption of either the screen ( 3 ) or the display device ( 1 ); determining, on a basis of either the image data ( 14 ) or a change in the image data ( 14 ), a reference value ( 16 ) characterizing one of the current consumption and the change in current consumption of either the screen ( 3 ) or the display device ( 1 ); and comparing the reference value ( 16 ) to the measured value ( 15 ).