D-Link DCM-100 user manual Troubleshooting, Problem Possible Solution

DCM-100 Ethernet Cable Modem

5

Troubleshooting

If the 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	Possible Solution
Cannot access the	Check all connections.
Internet or e-mail	• Make sure the cable TV line and the Ethernet (RJ-45) cable
service.
	is 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.
	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 sure they have given you the proper settings.
	Check your web browser configuration per ISP instruction.
Status LED	Check the cable line connection. If this is secure then there may be a
indicator blinks	weak signal coming from the central office. Report the problem to
continuously.	your cable operator if the cable connection appears to be OK.
LED indicators	Try to establish a new communication with your cable operator’s
appear to be	central office. This can be accomplished by powering off the
normal but	computer and turning it back on.
Internet access	The TCP/IP configuration for the computer may be incorrect.
cannot be
established
The PC Link light	The modem is not detecting the Network Interface Card. Make sure
is not green. The	the cables are firmly attached to the network card in the back of
light is off.	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.
The power light is	Check to make sure the power cable is firmly plugged into the cable
not on	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.

9