Cable Modem Troubleshooting: Motorola SB4200

Light patterns, images, manuals and more helpful info for the Motorola SB4200 cable modem –

Manufacturer: Motorola Model: SB4200
Modem Light Indicators

Flashing – Startup diagnostics in progress.
On – Cable modem is powered on.


Flashing – Scanning for a downstream channel.
On – Downstream channel is connected.

Send Flashing – Scanning for an upstream channel.
On – Upstream channel is connected.

Flashing – Scanning for a network connection.
On – Startup process complete. Modem aqcuired.


Flashing or On – Transmitting or receiving data.


This light turns on when the standby button is pressed and standby
mode is activated.
Notes and Useful Information:

This modem has a standby button located on the top of the unit. When activated, the LED lights turn off (except the standby LED) indicating the ethernet and usb ports are disabled. Note: The cable connection to the service provider remains active.

This modem was recalled from at least one large cable ISP in the US.

Installation and User Manual (Requires Adobe Acrobat)
Motorola Product Website

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