Cable Modem Troubleshooting: Motorola SBG900

Light patterns, images, manuals and more helpful info for the Motorola SBG900 cable modem –

Manufacturer: Motorola Model: SBG900
Modem Light Indicators
Power Flashing – power is supplied to the gateway

Off – power is not supplied to the gateway
Receive On – the downstream channel is connected

Flashing – scanning for a receive channel connection


On – the upstream channel is connected

Flashing – scanning for a send channel connection

Off – waiting for receive to connect


On – modem is online

Flashing – scanning for a network connection

Off – waiting for receive to connect


Flashing – transmitting or receiving data

Off – the cable interface is idle

On – wireless feature is functioning normally

Flashing – wireless activity
Notes and Useful Information

Installation and User Manual, .pdf (3.43MB)
Manufacturer Website
Manufacturer Product Page
Manufacturer Customer Support Page

3 thoughts on “Cable Modem Troubleshooting: Motorola SBG900”

  1. Pingback: Cable Modem Index - Simplehelp

  2. My modem works fine when its plugged into the computer but works on and off wirelessly, sometimes just disappears and you can’t log back into it. The pc activity light is green but the wireless light has always been yellow and never changes, is that the problem and how do I fix this?

  3. The wireless connection on the modem goes down for no apparent reason (the yellow light goes out). Sometimes the whole modem shuts off completely. I have to unplug and reconnect the power to solve both issues. The modem stays on most of the time but I usually have to do this over and over to get the wireless capability back. Sometimes 15 times, sometimes I just give up and try later. Any ideas?

Leave a Comment

Your email address will not be published. Required fields are marked *