If the screen is not turning on. There are several options depending on your type of display:
- Check that the batteries are installed correctly. The batteries may need to be replaced. Use standard alkaline batteries. Do not use heavy duty or rechargeable batteries.
- Check that the AC power adaptor is fully inserted, if running off AC power only.
- Reset the display by pressing the reset button, located on the back of the display or in the battery compartment.