DRB-II Problems & Error Messages

If a problem exists with the operation of DRB-II, DRB-II displays a blank screen, CCD bus failure message or NO RESPONSE, RAM TEST FAILURE, CARTRIDGE ERROR, KEYPAD TEST FAILURE, HIGH BATTERY or LOW BATTERY error message appears, refer to SELF-DIAGNOSTIC TESTS. Always start at TEST 1A: BLANK DRB-II MESSAGE SCREEN.