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Troubleshooting
Incorrect operation is sometimes mistaken for malfunction. If
problems occur, refer to this section for troubleshooting information.
If problems persist, contact Mark Levinson Customer Support at
781-280-0300 or www.marklevinson.com.
1. No audio and the front panel indicator LED is not lit.
• Examine ~ac mains connections to ensure the power cord
is connected to the ~ac mains connector and the electrical
outlet.
• Make sure the Nº432/431 is powered on with the power
button.
• Examine the electrical circuit breaker to ensure that power
is supplied to the electrical outlet to which the Nº432/431
is connected.
• A power loss or power outage may have occurred. In this
case, power cycle the Nº432/431 with the power button,
waiting at least 10 seconds between powering the
Nº432/431 off and on.
• A fuse may be blown inside the Nº432/431. In this case,
disconnect the power cord from the ~ac mains connector
and the electrical outlet. Then, contact an authorized
Mark Levinson dealer. Do not attempt to replace the
fuse. There are no user-serviceable parts within the
Nº432/431.
Danger! Potentially dangerous voltages and current capabilities exist
within the Nº432/431, even when power is disconnected from
the ~ac mains connector. DO NOT attempt to open the amplifier’s
cabinet. There are no user-serviceable parts inside the amplifier.
Refer all servicing to an authorized Mark Levinson dealer.
2. No audio and the front panel indicator LED is
dimly lit.
• The Nº432/431 is in sleep mode. To take it out of sleep
mode, press and release the standby button. The
Nº432/431 will power on or enter standby mode based on
the power save mode switch setting.
• A power loss or power outage may have occurred. In this
case, power cycle the Nº432/431 with the power button,
waiting at least 10 seconds between powering the
Nº432/431 off and on.