My HG635 router has worked well for 3-4 years but the last few months the 2.4 GHz channel drops out and has been getting progressively worse. I have the 2.4 GHz and 5 GHz on seperate SSID's and the 5 GHz usually stays up. I have tried swapping channels to 6 and 11 which has not worked. Only lowering the transmit power of the router has improved the 2.4 GHz dropout but its still frequent every 1-2 hours.
I believe the router is showing its age as when the 2.4 GHz drops out the router settings page slows to a crawl and login is unable and i am forced to manually restart the router. The reset pin on the back has also done nothing to improve performance, nor has a factory restore.