GRETAG REFLECTION DENSITOMETER D142 DISPLAY DOES NOT WORK. WITH POWER

GRETAG REFLECTION DENSITOMETER D142 DISPLAY DOES NOT WORK. WITH POWER CORD. WITH BLUE COLOR MEASURING STRIP. WITH BLACK MEASURING STRIP. WITH RED MEASURING STRIP. WITH YELLOW MEASURING STRIP. WITH CALIBRATION REFERENCES. TYP:D-142-3 #10100. WITH MANUAL.WITH CASE.