Section 1General Information5-2 Troubleshooting MN1230Control Troubleshooting ProcedureNo Keypad Display - Display Contrast AdjustmentIf there is no visible display, use the following procedure to adjust the contrast of thedisplay.Action Description Display CommentsApply Power No visible display.Press DISP key Ensures control in Display mode. Display mode.Press SHIFT key 2 times Allows display contrastadjustment.Press or