5-2
5.5 Checking Technical Alarms
Before troubleshooting the monitor, check for technical alarm messages. If an alarm
message is presented, eliminate the technical alarm first.
For detailed information on technical alarm message, possible cause and corrective action,
refer to the monitor’s Operation Manual.
5.6 Troubleshooting Guide
5.6.1 Power On/Off Failure
Symptoms Possible Cause Troubleshooting
The monitor
fails to start.
AC mains not connected
or battery too low
Check that AC mains is properly connected or
battery capacity is sufficient.
Cable defective
1. Check that the cable between the keypad board
and main board is correctly connected.
2. Check that the cable between the power board
and power management board is correctly
connected.
3. Check that the cable between the main board
and power management board is correctly
connected.
Power board defective Replace the power board.
Power management board
defective
Replace the power management board.
The main board failed. Replace the main board.
5.6.2 Display Failures
Symptoms Possible Cause Troubleshooting
The display is
blank or
black.
Cable defective
1. Check if the cable between the display and main
board and the backlight cable are correctly
connected.
2. Check that the cables and connectors are not
damaged.
Main board defective Replace the main board.
Display defective Replace the display.
Images
overlapped or
distorted
Main board error
Replace the main board, or upgrade the main board
with the upgrade software.
Cable defective
1. Check if the cable between the display and main
board and the backlight cable are correctly
connected.
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