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-[* black] ***Step 1*** calibrating the touchscreen
-[* black] From the Diagnostics Menu, select Touch Screen Calibration. The Calibrate Touch Screen screen is displayed (Figure F-12).
-[* black] Follow the steps shown on the screen. Press on the middle of each target with a blunt, narrow object.
+[* black] ***step 1*** touchscreen calibration
+[* black] From the Diagnostics Menu, select Touch Screen Calibration. The Calibrate Touch Screen screen is displayed
+[* black] Follow the steps shown. Press on the middle of each target with a blunt, narrow object.
+[* black] ***NOTE:*** If the Touch Screen Calibration button does not respond, press the Accept button on the navigation ring to begin
+[* black] If the calibration is not successful, have the ventilator serviced.