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CM1150V voice cable modem and Nighthawk AC1900 Smart WiFi router
I have the modem and router listed above connected to a Comcast 200 plan. The router is hard wired to my HP pc via an ethernet cable.
A few weeks ago my Internet connection started dropping and re-connecting every couple of minutes on my pc. I have shut down and re-started all of the components several times. Nothing changed. I contacted Comcast and they claim their signal is strong, with no issues. As you might expect, their solution is to get rid of my modem and rent theirs. Mine is a fairly new compatible modem. It has the latest software V2.02.04
Assuming their assessment is accurate, how can I determine whether the problem is being caused by my modem, router, or possibly my pc processor?
Jack Hudson
Wow, I can't believe I didn't think of that before. Hooked up my laptop via RJ45. Haven't had an error message in 3 hours!
New PC on it's way.
Thank you for all of your help. Great job!
Jack
17 Replies
that is a good questions. Usually you need to start at square 1 and rule that out. Square 1 is the modem. so do this with a hardwired pc:
1. Remove the router. Directly connect your pc to the modem and use it. make sure you use it long enough to verify if it drops or not.
Also log into it and take a screen snip of your modem connections page. Comcast might tell you the signals fine but that's usually their go-to response to get people on their equipment or keeping from having to send a tech out.
2. If the modem checks out and is stable for an extender period. Then we move to the router.
What firmware is on the router?
If its version 1.0.2.8, I'd start with a factory reset. In that version, netgear updated the router to include netgear armor and they also removed some features. It was a significant change. Enough that the routers have responded well to a factory reset and re-doing your setup manually (not using a backup). If it doesn't work, try downgrading prior to netgear armor. It hasn't been the smoothest rollout. Also reset the device afterwards if you downgrade.
Try the modem first and then move on to the router. If the modems stable and the firmware resets, downgrade doesn't fix it, let me know and we'll move on from there.
I am also on Comcast using a CM1150V modem. Have same firmware version, v2.02.04, as you have. Has been rock solid, so if the signal levels are good then it should just work. Best to start as suggested by plemans as there could be signal issues on the Comcast line. You can see this on the modem. If you have never looked, log into the modem. First page will have cable connection icon. Hit that and you will be taken to the signal level and errors page. Keep in mind we are dealing with a serial connection and it is normal to see a few. As an example, on my modem things are clean except for some errors on channel 29 and 30. Never caused any issues.
Thank you plemans. Directly connecting the modem to my pc was the first thing I tried when I encountered this issue, but I get the message "unidentified network". I don't know what to do to get by that. Jack
Sounds like you are using a Windows PC. That is the PC saying it has never seen this network. Usually there is a private or public selection. Selecting either should work for test. I would tend to select private.
