Test 4A - Keypad Test Failure Message
NOTE:
DO NOT touch DRB-II keypad during following test.
If DRB-II does not display KEYPAD TEST FAILURE, return to test that sent you here. If DRB-II displays KEYPAD TEST FAILURE, reboot DRB-II by reinstalling DRB-II cartridge. If DRB-II does not display KEYPAD TEST FAILURE, return to test that sent you here. If DRB-II displays KEYPAD TEST FAILURE, replace DRB-II.