| No display on clock. | 
              Check the power cord.Press the battery button on the clock. The date and time should appear. | 
           
            | Clock not connecting to clock server. |  | 
           
            | Clock not reading badges. | 
              Make sure the barcode is not damaged or faded.Make sure the card is swiped correctly with the barcode facing down and to the right.Try cleaning the reader head with a cotton swab and 95% isopropyl alcohol.Use a can of compressed air to remove dust and dirt from the reader slot. | 
           
            | Buttons not working. | 
              Press escape twice and try again.Inspect the buttons for possible damage. Do no use a pen—it can permanently damage the buttons.Press harder on the keypad to ensure a confirmation beep is heard for each key press. |