Cable modem randomly dropping and restarting

[Jdubya78]

I have 60Mbps service to my house from Comcast. I'm using a Motorola SB6121 and it has been having problems for a while now with randomly dropping signal and restarting. It has gotten worse over the last few weeks and now it does this multiple times an hour sometimes. I have been reading some other posts and sounds like it could be either bad wiring in the house or an issue between the house and where the service comes in. I'm totally inexperienced with this kind of trouble shooting so I'm hoping I can get some suggestions of how to check things on my end before I call Comcast. Thanks!

 

[MtnMan]

You can view the signal levels and other information by going to 192.168.100.1 with your browser.

How to interpret the levels.... https://arris.secure.force.com/cons...able-Signal-Levels/?l=en_US&fs=RelatedArticle

 

[Jdubya78]

You can view the signal levels and other information by going to 192.168.100.1 with your browser.

How to interpret the levels.... https://arris.secure.force.com/cons...able-Signal-Levels/?l=en_US&fs=RelatedArticle

This is very helpful! I’ll try that and see what it looks like. Thanks!

 

[VirtualLarry]

Well, I've been reading that the SB6141 (the '41, newer than yours), is old enough, that many of them are coming down with "Bad caps" inside. So, considering that yours is older, and by the same mfg, it seems even more likely.

Time to upgrade!

 

[MtnMan]

Well, I've been reading that the SB6141 (the '41, newer than yours), is old enough, that many of them are coming down with "Bad caps" inside. So, considering that yours is older, and by the same mfg, it seems even more likely.

Time to upgrade!

Actually the fact that a different model has been plagued by bad caps, in no way indicates that an older model will have the same problem. Motorola, (or who ever makes the boards in their cable modems0 and every other vendor buy caps in bulk from other vendors, and from time to time there will be a batch prone to failure. The caps in an older 6121's may not even be from the same manufacturer as those in the newer 6141's that are prone to failure.

OBTW, the signal levels i have on my 6121 are just fine, thank you. They were out of range a year ago, and the modem kept dropping connection and the cable company found a bad filter mounted on the pole at the street, problem solved.

Further, if Comcast is providing 60Mb service, there is no reason to 'upgrade', as the only thing he will notice is he is missing $50 bucks from his pocket. the 6121 is good up to about 170Mbps.

 

[Fanatical Meat]

Buy one and stop paying for your modem.

 

[QuietDad]

Welcome to Comcast. The first thing I do with any cable problem, before I look at anything, is call the cable company and tell them I'm having issues. After the obligatory Tech Service "Please reboot the modem and router" waste of 5 minutes, I let them decide if the signals are a problem or not. I have both Optimum and FIOS in the house and I am network "savy" and it's rarely my
equipment and most of the time they send a tech to redo the filtings on the cables to make it look like they did something. But at the end of a day of calls and a tech visit is does seem to settle down