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Display devices play a vital role as the man-machine interface in most embedded domains including the automotive industry. Display systems provide information regarding the health of various safety critical subsystems and the general status of the machine. Accuracy and precision of the information displayed is a key factor in proper machine operation. Hence display systems need to be tested meticulously before they are delivered to the customer. Current Scenario The present generation display ECM's (Electronic Control Module) function is not restricted to displaying parameters like fuel level or speed; it also acts as the virtual master of the vehicle. Most display ECMs in off-highway vehicles present at least half a dozen screens to the operator, who selects the one he wants to view based on the need. Hence testing the display ECM becomes as complex as its design.