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Motorola surfboard modem sb5101u receive light is blinking

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1 Answer

Receive light blinking


First make sure your router is working (can you ping it?)
Open the modem's web page at 192.168.100.1 and check the Status. Also look at the Signal-to-Noise ratio. Check the logs for obvious errors.
Do NOT change any settings if you don't know what your doing!
If you have exchanged the modem, comcast has to know the new MAC address or your modem will not authenticate.

Either post your findings here or call comcast again - there might be an issue with the connection to the outside, since you are (hopefully) getting an IP address on your computer and the modem is powering on.
Question always is: is this your modem or did you lease it from Comcast? If it's theirs, they have to fix it, if it's yours you can call and tell them that internally everything is working.

Let me know if you need more help.

Aug 15, 2013 | Arris SURFboard® SB5101 Cable Modem

1 Answer

My modem has a problem where it has two blinking lights ( send and recieve) can you help


hi,

Its normal for your modem to have a blinking send and received lights because that means that its sending and received data from the server itself...

Hope this will help... your response is very much appreciated...

Jan 21, 2011 | Arris SURFboard SB5101U DOCSIS 2.0 Cable...

1 Answer

Will this work with Comcast broadband and Windows 7?


This modem will work with Comcast High Speed Internet.
You will have to contact Motorola for drivers for the Windows 7.

It does matter how fast your internet speed is,anything faster than 20meg,will need a Docsis 3.0 modem.

Jan 13, 2011 | Arris SURFboard SB5101U DOCSIS 2.0 Cable...

1 Answer

I have the Motorola surfboard SB4200 modem. THe lights are not on: only the power light is solid and the receive light is blinking. Any suggestions?


Phone your tel company and ask them to check your phone line for faults.Then check your leads or replace them.Uninstall the modem and reinstall it through the disc that came with it.

Sep 12, 2010 | Arris SURFboard SB4200 Modem

1 Answer

When i reset my modem it goes through the normal start up process but when it is trying to connect online the lights start flashing.(receive &send ) lights flash.


The light pattern you have described shows that the modem can not establish a connection to your internet service provider (ISP). This is typically do to a signal related issue. To trouble shoot the problem you will need to connect the modem directly to the main cable line where it first enters into the home. You will know when the modem establishes a connection by the top 4 lights becoming solid green. If at any point all 4 top green lights start to blink in sequence than you will need to contact your internet service provider to "unwall the modem". Remember most internet service providers require you to register new modems on there network. So if you have not all ready completed that process you will most likely not have access. If you can not get a connection from the main line than there is a issue with either the modem or the signal coming into the home and you will need to contact your internet service provider.

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

Aug 31, 2010 | Arris SURFboard SB5101U DOCSIS 2.0 Cable...

1 Answer

Motorola cable modem sb5101 the receive light blink an the same as the send light


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.

Nov 08, 2009 | Arris SURFboard® SB5101 Cable 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

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