Diagnosing a Problem
Troubleshooting
4-2 Efficia CM Series Service Guide
• Select System ( ). The General tab of the System Menu appears.
Diagnosing a Problem
Before you begin to troubleshoot a problem or open the monitor for repair, check the
following basics:
1. Is the power switch turned on?
2. Is the battery adequately charged?
3. Is the AC power cord connected to the monitor and plugged into a functional AC
outlet?
4. Is the monitor's display functioning?
5. Are the LEDs on the front of the monitor lit as you expect?
Notes
• It may take several seconds for the AC Power LED to light or turn off after
the AC power cord has been connected or disconnected.
• It may take several seconds for the battery status icon to update and
appear.
If the monitor is not receiving power:
1. Check “Start-up and Power Sequences” on page 4-2, and then follow the
troubleshooting steps in “Power Problems” on page 4-5.
2. If the monitor has no — or an incorrect — display, follow the troubleshooting
steps in “Display Problems” on page 4-5.
When the monitor has power and a functioning display, use the information in this
chapter to diagnose other monitor problems.
Start-up and Power Sequences
The following table describes the start-up and power on phases of the monitor and its
components. If the monitor does not behave as described in the following table, see
“Display Problems” on page 4-5.
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