I have a net gear AC1600 and it has worked awesome for the 10 months I have had it. A few days ago it stopped connecting to the internet (device says WiFi has no internet connection).
It works for about 15-30 minutes after power cycle. The upload and download lights both keep flashing after 30ish minutes after reset and we lose all internet.
Note: For trouble shooting I have tried power cycling, factory reset, checked COAX cables and splitters, XFINITY tech says it’s definitely the modem because everything else is working and other modems work when installed, and I believe I have the latest firmware available for it.
Power light is solids green. Download light will flicker on and off until it connects and then it’s solid, the upload light will flicker and then after about 15 minutes it restarts the process. All are green. 5GHZ and 2.4 GHZ are solid green entire time.
You've only got 1 channel locked. You should have a lot more.
Start with removing any amplifiers, signal attenuators, or splitters from the coax. From there check the line for kinks, damage, moisture in the line. Check the connectors for improperly made ends, foil touching the copper coax line, bad/old/cheap connectors, or corroded connections. Replace them if you do. If you can, simply connect the modem right where the coax comes into the home. This prevents wiring in the home from being the issue. And some ISP’s charge if the wiring issue is in the home. So this helps prevent this.
If this doesn't help, then the isp needs to check the line.
