Cable Modem Troubleshooting: Motorola SB4101

Light patterns, images, manuals and more helpful info for the Motorola SB4101 cable modem –

Manufacturer: MotorolaModel: SB4101
Motorola SB4101 cable modem
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.

SendFlashing – 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 indicating the ethernet and usb ports
are disabled. Note: The cable connection to the service provider remains

Installation and User Manual (Requires Adobe Acrobat)
Motorola Product Website (USB Drivers can also be found here)

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0 thoughts on “Cable Modem Troubleshooting: Motorola SB4101”

  1. The online light on my modem is blinking. If I keep resetting it, I finally get a solid light and can get on the internet. This started about a week ago. Is my modem going bad or is there another solution??? Thank you!!!

  2. Though I did email this to Richard, I thought it appropriate to post here in case anyone else has the same question.


    Nope – if you’re online using your modem, I’d suggest you leave it alone (I subscribe to the “don’t fix it if it isn’t broken” theory). With that said, if you’re connected via USB and want to upgrade your drivers to try and improve performance, they can be found here.

    I’d strongly suggest that you have a backup of the older drivers (do you still have the CD that came w/ the modem?) just in case something goes wrong. Hope this helps!

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