Troubleshooting - D-Link DCM-200 User Manual

If your USB/Ethernet Cable Modem has been properly set up it is unlikely that you should experience any problems
with it under normal circumstances. However, we list here some possible solutions to problems that you might
experience.
Problem
Cannot access
Internet or e-mail
service.
Status LED
indicator blinks
continuously.
LED indicators
appear to be
normal but
Internet access
can not be
established
The PC Link light
is not green. The
light is off.
The power light is
not on
If your TV's picture quality is diminished when the USB/Ethernet Cable Modem is in operation, you may
Note:
need to contact your Cable TV operator to obtain a High Pass Filter. This should be placed between the
Possible Solution
Check all connections. Make sure the cable TV line and either the
USB cable or the Ethernet (RJ-45) cable are securely connected at all
points. Make sure the AC power adapter is plugged into the device and
the power source. Check the LED indicators to see that the Power,
Link and Status indicators are steadily lit for an Ethernet-connected
device, or the Power and Status indicators are steadily lit for a USB-
connected device.
Contact your cable service operator to verify that your account is up to
date and that you have two-way service.
There may be a problem with your NIC. Refer to the literature for the
NIC to find a possible solution.
The TCP/IP configuration for the computer may be incorrect. Double-
check to see that these network settings comply with the instructions
given by the cable service operator. Call your cable company to make
they have given you the proper settings.
Check the cable line connection. If this is secure then there may be a
weak signal coming from the central office. Report the problem to
your cable operator if the cable connection appears to be OK.
Try to establish a new communication with your cable operator's
central office. This can be accomplished by powering off the computer
and turning it back on.
The TCP/IP configuration for the computer may be incorrect.
The modem is not detecting the Network Interface Card. Make sure
the cables are firmly attached to the network card in the back of your
computer and the modem as well.
Try replacing the Ethernet cable or the network card with known
working components.
Run diagnostic program that came with your network card.
If this is a card that we support, troubleshoot the NIC. Otherwise,
contact the organization that installed or manufacturers the card.
Check to make sure the power cable is firmly plugged into the cable
modem. Also, make sure that the power converter is plugged into a
functional socket.
Change outlets with one you know to have power.
Replace Cable Modem.
DCM-200 USB/Ethernet Cable Modem

Troubleshooting

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