Question about Arris SB5100 SURFboard DOCSIS 2.0 Cable Modem (50120900100)

2 Answers

Motorola SB5101 Modem

I have just recently gotten the internet and for the first couple of weeks the modem worked just fine. We went to log on to the internet and it is not working. When we troubleshoot the problem it says no modem detected. I go into the device manager and check the comport, the modem connection and I made sure everything was enabled that should be. Do you have any idea what might be wrong???? Please help

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  • KellieO Feb 08, 2008

    I don't see where there is a place on the back to reset the modem. Any other suggestions? I appreciate your help.

  • Anonymous Apr 09, 2008

    The standby button on the top no longer works.

  • Anonymous Apr 11, 2008

    conection two computer in modem motorola sb5101

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2 Answers



have change internet provider from Charter to AT&T.
AT&T system does not recognize SB5100.
How do I solve this problem.

Posted on Apr 24, 2008

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  • 7 Answers

Reset the modem at the backside with a pen and restart the computer, check for all the leds and it should be stable

Posted on Feb 08, 2008

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1 Answer

My Motorola sb5101 won't come online how do I troubleshoot this? My cable connection is fine. When the modem boots up the green power light comes on and stays on followed by the receive light and the send...


These modems are very tricky. When this type modem goes into stand by modem that indicates that you do have a connection to your internet service provider. The reason you cant get online is because all internet access is disabled wile the modem is in standby. If you look closely there is a button located on the top of the modem. This is the stand by button. If you hit that button it should take the modem out of stand by mode and reestablish your connection to the internet.

I hope that information above has helped is some way.
If possible please rate this solution.

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If you are able to access the internet this is a normal operating status. These lights are just letting you know there is activity present with the modem and the modem is sending and receiving information with your provider.

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If you have the following lights :
Power light - on
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Call your internet service provider....

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You need to input IP and DNS information in windows. I can only help you where to input but you need to contact your ISP for IP address.

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If all the lights go out I would assume you mean the power light as well. Couple of things I would look at:

Has your ISP replaced the modem including the power adapter?
Has your ISP verified there is no short on the incoming data cable? You could try to wiggle the incoming data cable to see if the lights go out. I would do the same on the power cable.

If it's not a mechanical fault (cables), verify that you have the correct and current drivers for your modem and operating system.

Good luck and thanks for using FixYa.

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Try putting 192.168.100.1 in the address box of a web browser. If the modem is provided by your ISP you might need to call them if that won't work.

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