TROUBLESHOOTING GUIDE (CONTINUED)
SYMPTOM | CAUSE  | SOLUTION  | 
No buttons work.  | The Lock feature is  | Deactivate Lock feature as  | 
  | activated.  | described on page 18.  | 
  | Unit needs to be reset  | Reset unit and/or  | 
  | or firmware needs to be  | update firmware, see | 
  | updated.  | pages   | 
Unit acting erratically.  | Unit needs to be reset  | Reset unit and/or  | 
  | or firmware needs to be  | update firmware, see  | 
  | updated.  | pages   | 
  | 
  | 
  | 
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