25
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.