Test 4A - Cartridge Error
- Disconnect and reconnect DRB. DO NOT touch keypad. If DRB does not display CARTRIDGE ERROR, proceed to next step. If DRB displays CARTRIDGE ERROR, replace DRB cartridge. Perform TEST VER-1. Return to TEST 1A.
- If DRB displays KEY PAD TEST FAILURE, replace DRB. Perform TEST VER-1. If DRB does not display KEY PAD TEST FAILURE, return to TEST 1A.