I have googled for an hour and have tried just about evrything. My router (Netgear Wireless N-150) worked fine yesterday and I have not changed a thing. Today it will not let me sign it to my pS3. I can hard wire it but router will not pick up signal. Please help.
You should look for a firmware update for your router from Netgear's website. You will need the model number and version number from the sticker under your router.
Afterwards, see if your connection strength is stronger. If you don't have any wireless-n devices, then set your router to g-only instead of b/g/n. Try a less congested channel on either channel 1 or channel 11 to avoid interference.
The firmware on the routers is usually old by the time you buy it in stores. New firmware increases connection quality, adds features and fixes errors. Definitely worth a shot if you want to avoid problems down the road.