Test 4A - Cartridge Error
- Without touching DRB keypad, disconnect and reconnect DRB. If DRB does not display CARTRIDGE ERROR, go to next step. If DRB displays CARTRIDGE ERROR, replace DRB cartridge. Return to TEST 1A.
- If DRB displays KEY PAD TEST FAILURE, replace DRB. If DRB does not display KEY PAD TEST FAILURE, return to TEST 1A.