On several occasions I have turned on my computer to surf the net only to discover that my computer cannot "see" my router. I have tried rebooting both computer and router. Nothing. Typing 192.168.1.1 gives nothing. My computer can see my neighbours' networks but not mine. Eventually after several hours the router reappears and I can proceed. Incidentally I also use my smartphone with the router and that also fails to detect the wireless signal.
Please reply before it goes down again.
Thanks!