CipherLab 5000 Hardware Manual page 90

The keyboard input seems not working properly...
Test keyboard.
If the problem persists, re-connect the power and perform test.
The external devices controlled by DI/DO signals are not working properly...
Check if the device is properly wired to the terminal blocks.
If the problem persists, re-connect the power and perform test.
About abnormal response...
The LEDs or LCD seem not working properly –
Test components.
If the problem persists, re-connect the power and perform test.
The buzzer seems not working properly –
Test audible indicators.
If the problem persists, re-connect the power and perform test.
The terminal seems not working properly –
First upload all data to a computer, and then test memory.
If the problem persists, re-connect the power and perform test.
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Troubleshooting
>> Also see Section 4.3.3 Tests: Keyboard
>> Also see Section 4.3.3 Tests: LCD & LED
>> Also see Section 4.3.3 Tests: Buzzer
>> Also see Section 4.3.3 Tests: Memory