Cable Modem Troubleshooting: Linksys BEFCMU10 version 2

Light patterns, images, manuals and more helpful info for the Linksys BEFCMU10 version 2 cable modem –

Manufacturer: Linksys Model: BEFCMU10 version 2
linksys befcmu10 v2
Modem Light Indicators

Solid – Power is connected.
Off – Power is not connected or power supply is incorrect or bad.


Solid- Ethernet or USB connection is detected.
Flashing – Data is being tramitted to/from USB/ethernet device.
Off – No ethernet of USB connection is detected.

Send Flashes in sync with data being transmitted through cable network.

Flashes in sync with data being received through cable network.


Solid – Modem is acquired.
Flashing (.125 sec) – Ranging process is OK.
Flashing (.25 sec) – Downstream is locked, and sync OK.
Flashing (.5 sec) – Scanning for downstream channel.
Flashing (1 sec) – Boot up, not ready.
Off – Error condition.

Notes and Useful Information:

Installation and User Manual
USB Driver Link (select your model from the drop down list)

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