The display remains blank, partially visible or unreadable during operation.
Possible Causes
1.) Power supply failure.
2.) Battery discharged.
3.) Loose display connection.
4.) LED display fault.
5.) Main board malfunction.
Troubleshooting Procedure
1.) Verify power supply.
2.) Charge the battery.
3.) Restart the indicator.
4.) Inspect display connections.
5.) Check display brightness.
6.) Contact service if the issue persists.
Prevention
1.) Protect indicator from moisture.
2.) Maintain stable power supply.
3.) Perform routine inspections.
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