I have had this modem for a few years. I've had no issues with it ever before. This morning, I suddenly lost internet connection. The modem restarted on its own, and when it came back on, it had no internet connection. The second light, the send/receive light, flashes at a very rapid pace, the internet connection light below it is off completely. It doesn't light up or flash at all. I've done a hard reset on the modem. I've done multiple troubleshooting sessions with Comcast today unplugging everything. At this point I have Comcast coming out tomorrow to look at things. I'm hoping to get some suggestions for what the problem could actually be. I feel like the issue is something with Comcast but I am worried they will just tell me to get a new modem. Thanks for your help!
In this case you can try logging t the modem interface and check the WAN IP address to confirm whether the modem is getting signal from the service provider or not. If the devices are connected without internet you can perform hard reset on the modem please, disconnect the coaxial cable from the back of the device? At the back of the modem, in the middle section you will see a small hole, inside that hole there is a button, and that is the reset button, please insert a paper clip or a tip of a pen and hold it for 15-30 seconds until all your lights go off, afterwards connect the coax cable back and wait until your device fully boots up. After resetting the modem will go to default setup any custom settings will be removed so use the default network name and password to connect to your network.
After Reset were you able to connect to the Default Wi-Fi Name and Password (which is available at the bottom of the device) and able to access the internet?
Also, the LED lights of the modem is it Solid/Flashing /Off in the send/receive and online?
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