The indicator remains OFF when the power key is pressed.
Possible Causes
1.) No AC power supply.
2.) Battery fully discharged.
3.) Faulty charger.
4.) Loose power connection.
5.) Internal power supply fault.
6.) Main board failure.
Troubleshooting Procedure
1.) Verify AC power source.
2.) Check charger operation.
3.) Charge battery fully.
4.) Inspect power cable connections.
5.) Restart the indicator.
6.) Test with alternate power source.
7.) Contact authorized Essae service if required.
Prevention
1.) Maintain battery charge.
2.) Inspect power cables regularly.
3.) Protect the indicator from voltage fluctuations.
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