I have a Netgear DG834GT WiFi router, which also doubles up as an ADSL modem. I have been using it for the last 4 years, and did not have any problems until now. For the past month I have been observing that the WiFi access point is not accessible sometimes. Once I start using the access point, it would drop after some time, there is no specific time frame for that, the start of drop varies, and is not consistent.
I initially thought that it was interference, and tried changing channels, this works sometimes but not always, and in some cases just simple reboot without changing will also work, but again not always. My laptop does not pick any other access points so I dont think that this could be interference, and I don't know of interference devices being used in the home limits. I have other devices using the WiFi access point and none of them can recognize the AP once it drops.
I am able to access the internet through the LAN properly by connecting a cable.
I can consider a firmware upgrade, but since this was a device I have been using for 4 years, I dont think this could be a firmware related issue.