YES ALL CABLES ARE PLUGGED IN PORTS WHICH ARE LIT UP
THIS HAS HAPPENED BEFORE AN BY UNPLUGGING THE LINKSYS IT USUALLY RESETS BUT HAS NOT DONE THAT SO FAR TODAY
Ok, from the computer that is connected to the router via cable, open Internet Explorer, type 192.168.1.1 in address field and hit Enter.
If asked for username/password, leave username blank and enter "admin" for password (without quotes). Once in, click on Wireless, then change Channel to 11. Make sure Wireless is enabled, as well. Another thing to check would be the antenna in the back (if your model has external antenna), check the connection there.
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THERE IS NO COMPUTER CONNECTED TO THIS ROUTER VIA CABLE. THE CABLE GO FROM A COMCAST BOX TO ANOTHER ROUTER...THEN A CABLE FROM THAT ROUTER TO THE WIRELESS
Ok, can you give me the brand/model of the router connected to comcast box and brand/model of the wireless?
Ok, so that i understand it correctly, all computers on your network are connecting to Sonicwall, and then your wireless Linksys router is also connecting to the Sonicwall? So your computers still are able to access internet/intranet but if you want to connect wirelessly you can't?
Ok, i will be away from the computer for about 1-1.5 hours, so just wanted to give a suggestion if my previous assumption is confirmed. Connect a PC or laptop directly to the wireless access point. Browse via Internet Explorer to 192.168.1.245 (unless default IP for it has been changed). After loggin in (leave username blank and password XXXXX "admin"), click on Setup, and make sure the wireless is enabled. If the security is set up on it, and you're aware of the settings, make sure it still the same and WAP didn't lose its settings. I usually prefer WPA-Personal(WPA-PSK) setting with passphrase between 8 and 63 characters. Save Settings and try connecting to it wirelessly again.