B
A
Troubleshooting
If the solutions listed here do not solve your problem, contact your service provider.
You may have to reset the SB6121 modem configuration to its original factory settings if the cable modem is not functioning properly.
Your service provider may ask for the status of the icon lights as described in Front Panel Icons and Error Conditions.
Solutions
Table 1 – Troubleshooting Solutions
MODEM PROBLEM | POSSIBLE SOLUTION |
|
|
|
|
Power Icon is OFF | • Check that the SB6121 is properly plugged into the | |
| electrical wall outlet. |
|
| • Check that the electrical outlet is working. |
|
| • Check that the Energy Conservation switch | is ON |
| (pushed in). |
|
|
| |
Cannot Send or | • On the front panel, note the status of the icons and refer | |
Receive Data | to Front Panel Icons and Error Conditions to identify the | |
error.
• If you have cable television, check your television to ensure your cable service is operating properly.
• Check the coaxial cable connection at the SB6121 and cable wall outlet.
• Check the IP address. Follow the steps for verifying the IP address for your system described in Configuring TCP/IP. Call your service provider if you need an IP address.
• Check that the Ethernet cable is properly connected to the SB6121 and the computer.
• If a device is connected via the Ethernet port, check that the ONLINE icon is ON to verify connectivity.
• Call your service provider for further assistance.
Troubleshooting • Solutions
SB6121 DOCSIS 3.0® Cable Modem • Installation Guide | 16 |
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