Monster Power Professional PowerCenter PRO 5100 Owner's Manual page 27

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