Cable Modem Troubleshooting: High Speed Surfing SM100

Solid - Modem is receiving power.
Flashing - Modem self diagnostics in progress.
Off - Modem is not receiving power.

Off - Downstream RF carrier is not present or power is off.
Flashing Slowly - Downstream RF carrier is present and ranging in progress.
Flashing Rapidly - Registration in progress
Solid - Modem is acquired.

Off - No ethernet carrier present or power is off.
Solid - Ethernet carrier is present.

Flashes in sync with data transmission through the cable modem.

Test

Off - Initial self test is OK or power is off.
Flashing - Initial self test in progress or modem image downloading.
Solid - Failure of self test.

Notes and Useful Information:

Installation and User Manual

Manufacturer Product Website