8 Troubleshooting
110
Boot Phase Failures
Symptoms Possible Causes of Failure Failure Isolation and Remedy
Green LED does not light
up, and no test tone is
heard
No AC mains connection Check that the power cord is not damaged,
and is properly connected to the monitor.
Check that the power cord is correctly
connected to a powered AC mains socket.
Power supply defective
Remove the power supply, and check if the
output voltage is within the specifications
(24 V). Measure on the multi-colored wired
connection between the red and black wires.
Exchange the power supply if it is defective.
Power On/Off switch defective
Replace the power supply.
Aborted/interrupted or inconsistent
software configuration
Perform a software upgrade using the
Support Tool.
Main CPU Board defective Replace the Main CPU Board. Add the
boards in reverse order and try again with
each board.
Green LED does not light
up, but you hear a test
tone
Display assembly not connected to the
Main CPU Board
Check if Display assembly is connected
correctly to the Recorder Adapter Board.
Check the multi-pin connector between the
Recorder Adapter Board and the Main CPU
Board.
Touch controller defective
Replace the Display assembly.
Display Adapter Board defective
Disconnect and reconnect the flat cable of
the Display Adapter Board and check again.
LED defective Try to switch on the monitor. If it operates
normally, the LED is defective. Repair is
effected by replacing the Display assembly.
Green LED stays on
continuously
Main CPU Board defective Try loading new software. If this does not
solve the problem, replace the Main CPU
Board.
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