Cable Modem Troubleshooting: SMC 8004CM

Light patterns, images, manuals and more helpful info for the SMC 8004CM cable modem –

Manufacturer: SMC Model: 8004CM
Modem Light Indicators

Off – Modem is not receiving power.
On – Modem power is activated and receiving power.

Cable Flashing Orange – The modem is searching for the downstream frequency.
On (Orange) – Searching for upstream frequency.
On (Green) – Modem is acquired. Data can be sent.

Flashing – Modem is registering with the head-end.
On- Modem is acquired.


On – Indicates a valid Ethernet connection.
Flashing – Modem is transmitting/receving data.


On – Indicates a valid USB connection.
Flashing – Modem is transmitting/receving data.

Notes and Useful Information:

Installation and User Manual

Manufacturer Product Website

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