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

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ONLINE light is off, power, receive and send are on.

My ONLINE light is off. Would the cable connector going into the modem be the problem?

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


No online means no connection to the cable company DHCP server

Posted on Aug 17, 2008

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Related Questions:

1 Answer

Receive and send lights keep flashing and no connection can be obtained


Reset the modem by removing the power for at least 45 seconds,try to get online.
If you have a router, reset that also. Modem first, then router,in sequence.

Check the cable going to the modem for any cuts or connector is loose.

If it still won't work ,replace the cable.

Lastly, call your Internet provider.

Nov 27, 2010 | Arris SURFboard SB5101 Cable Modem

2 Answers

My Motorola Sb5101 modem will not let me access the internet, the send light constantly flashes and i can't attain any internet connection.


If you have the following lights :
Power light - on
Receive light - flashing
Send light - flashing
Online light - off
PC/Activity - on
Standby - off
Then your Network Access is OFF - modem is successfuly registered but Network Access Control is disabled via DOCSIS configuration file.

Call your internet service provider....

Nov 06, 2009 | Arris SURFboard SB5101 Cable Modem

2 Answers

Power, Receive, Send flashes, No online light or the rest. Help?


Throw it away or send it to Motorola they get very HOT and this causes failure its common in routers and modems

Sep 21, 2009 | Arris SURFboard SB4200 Modem

3 Answers

No connectivity; constant blinking LED lights "Receive" and "Send"


Or you didn't pay your subscription on time and the ISP disabled your cable modem to send user traffic over the cable network. When both Send and Receive lights are blinking that is a visual aid that the modem is working fine, but the ISP disabled its access to the network (unpaid bill, legal issues, etc.)

May 17, 2009 | Arris SURFboard SB5101 Cable Modem

1 Answer

Online light off, all other line are on


i guess the above procedure msut work

Sep 28, 2008 | Arris SURFboard SB4200 Modem

1 Answer

Receive activity and send lights are blinking. power light is on. and online is off


try to unplug it and the cable for a few minutes, then replug it and see if that helps.

Jul 27, 2008 | Arris SURFboard SB4200 Modem

1 Answer

Receive, send, and activity lights are all blinking but online light is off


Power Cycle the modem if the 4 lights do not go solid you would want to contact your cable provider to ensure signal is being received properly to modem.

Jul 27, 2008 | Arris SURFboard SB4200 Modem

1 Answer

Only 3 Lights Come on, Not online though.


That online light goes solid when your ISP completes the registration process of your modem. If this process fails, there are only 2 possible reasons. The first is your modem MAC address is not on your account with your ISP, which cannot be your case because it works on a different outlet. The second reason would be what is called ingress on the outlet. Ingress is caused by a bad outlet or more frequently a bad connector. Make sure inside your connector is clean and free of metal shavings. The problem you are describing is actually rare because usually if your having cable issues that cause a registration problem, you don't usually get a send light.

By the way, just because your tv works on that outlet doesn't mean your modem will. Your modem runs off RF frequencies that your TV doesn't come close to.

Jan 21, 2008 | Arris SB5100 SURFboard DOCSIS 2.0 Cable...

1 Answer

Im having problems getting my modem to get online. The light wont come on. All but the online light come on. The online light blinks then all the lights go off except the power light, and the receive...


Your modem is not synching. It could be a number of possibilities, and you're going to have to do some troubleshooting to narrow it down.
  • Verify that your AC, Cat 5, & ethernet cables are connected securly
  • Verify that your modem is not in "standby" mode
  • Power cycle your modem
  • Try a different cable outlet
  • Call your ISP to make sure your modem is provisioned and your service is set up for cable internet.

Nov 06, 2007 | Arris SURFboard SB5120 Modem

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