Troubleshooting
The modem lights indicate the current status of your cable modem. To troubleshoot any connection problems, use
the table below.
Modem
Light
Status Problem
Power
On None – the modem is powered on
Off
No power – Verify power supply connections and electrical outlet. Ensure the outlet is not
connected to a switch.
Receive
Solid Blue None – multiple downstream channels are in use
Solid Green None – one downstream channel is in use
Blinking None – scanning for downstream channels
Off
No downstream channels are in use – Verify all cable connections and try resetting the
modem.
Send
Solid Blue None – multiple upstream channels are in use
Solid Green None – one downstream channel is in use
Blinking
Green
None – scanning for an upstream channel
Off
No upstream channels are in use – Verify all cable connections and try resetting the
modem.
Status
On None – the modem is online
Blinking None – the modem is registering a connection
Off The modem is offline – Verify all cable connections and try resetting the modem.
Ethernet
On None – a device is connected to the Ethernet port
Blinking None – data is being transferred over the Ethernet connection
Off
No device is connected or the device is disabled – Verify all cable connections and try
resetting the modem.
Manufacturer Resources
LinksysCM30XX_UserGuide [PDF]
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