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5 Troubleshooting
5.1 Overview
In this chapter, equipment problems are listed along with possible causes and
recommended corrective actions. Refer to the tables to check the monitor, identify and
eliminate the troubles.
The troubles we list here are common difficulties and the actions we recommend can
correct most problems. For more information on troubleshooting, contact our Technical
Support Department.
5.2 Parts Replacement
Printed circuit boards (PCBs), major parts and components in the monitor are replaceable.
Once you isolate a PCB you suspect defective, follow the instructions in chapter 6
Disassembly and Repair to replace the PCB with a known good one and check that the
trouble disappears or the equipment passes all performance tests. If the trouble remains,
exchange the replacement PCB with the original PCB and continue troubleshooting as
directed in this chapter.
To obtain information on replacement parts or order them, refer to chapter 7 Parts.
5.3 Troubleshooting Guide
5.3.1 Power On/Off Failure
Symptoms
Possible Cause
Troubleshooting
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.
The monitor
fails to start.
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