I have a Netgear WGR614 wireless router and recently I lose sight of it a couple of times a day. That is to say, either my SSID disappears from my available networks list or, if it's listed, I cannot connect. The only solution I've found so far is to walk up to the router, and "power cycle it"--i.e. unplug it, wait and replug the power cord.
I've tried doing a full reset by holding in the reset button but it still goes AWOL.
(I know routers are cheap and it is probably easier to just replace it.) Many thanks