Determine if the LED Board Is Faulty
You must determine if the LED board is faulty before you replace it.
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Press and hold the Locator button for more than 5 seconds.
See Front Panel LEDs.
All of the LEDs in the LED assembly should light.
If the LED board is faulty, replace it. See Remove the LED Board.
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If you are unable to determine if the LED board is faulty, seek further
information.
See Detecting and Managing Faults.