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Symptom
Speakers emit a humming
or buzzing noise.
Alarm beeps continuously.
"Ground OK" Diagnostic
Indicator Light does not
come on.
Possible Cause
The PowerCenter
is sharing AC power
with equipment that
is not properly grounded.
The PowerCenter protection
circuitry has sacrificed
itself to protect connected
equipment from a
catastrophic surge.
Make sure PowerCenter
is plugged into
grounded outlet.
Remedy
• Connect your PowerCenter
to a dedicated outlet.
• Try unplugging different
components from the
PowerCenter one at a time
to see if the noise stops.
• Make sure all components
are plugged
into PowerCenter.
The PowerCenter must
be replaced. See the
Warranty Information
section for important details.
Contact a qualified
electrician to check outlet(s)
for proper grounding.
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