Black Box MD1640A Possible Causes and Solutions, None of the LEDs Light When the Modem Is On

APPENDIX A: Troubleshooting

Appendixes

Appendix A - Troubleshooting

Your Series II Modem was thoroughly tested at the factory before it was shipped. If you are unable to make a successful connection or if you experience data loss or garbled characters during your connection, it is possible that the modem is defective. However, it is more likely that the source of your problem lies elsewhere. Problems you may encounter include the following:

•None of the LEDs light when the modem is on.

•The modem does not respond to commands.

•The modem dials but is unable to make a connection.

•The modem disconnects while on-line.

•The modem cannot connect when answering.

•File transfer is slower than it should be.

•I am losing data.

•I am getting garbage characters on the monitor.

•I can’t run my fax and communications software at the same time.

If you experience problems, please check the possibilities in Section A.1 before calling Tech Support (see Section A.2).

A.1 Possible Causes and Solutions

None of the LEDs Light When the Modem Is On

When you turn on the Series II Modem, the LED indicators on the front panel should flash briefly as the modem runs a self-test. If the LEDs remain off, the modem is probably not receiving power.

•Make sure the modem’s power switch is on, especially if you nor- mally turn on the modem by turning on a power strip.

•If the power supply is plugged into a power strip, make sure the power strip is plugged in and its power switch is on.

•Make sure the power supply module is firmly connected to the modem and to the wall outlet or power strip.

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