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TROUBLESHOOTING
Symptom Possible Cause Remedy
The speakers
hum or buzz.
The PowerCenter is sharing AC power with
equipment that’s not properly grounded.
• Connect your PowerCenter
to a dedicated outlet.
The “GROUND OK”
LED is off.
The PowerCenter is not plugged into a properly
grounded AC outlet.
• Plug the PowerCenter into a properly
grounded 120V outlet.