Check the speakers to make sure they are turned on and the power cord is properly connected. A loose cable could prevent adequate power from reaching the speakers. Unplug the power connector and plug it in again, switch on the speakers and ensure that the speakers are powered properly.

If the speakers are functioning and you still can't see a lighted LED, it's likely to be blown. In such cases, you should send the speakers to the service center to get the LED replaced.

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