When you save the network setup that generally is saving it for a one time connection, to have it remember it , there should be a favorites list, or terminology like that, that saves the setup permanetely usually having you name it something like home wpa or whatever, but just saving is normally a one time thing, that is why you are having to go through all this each and everytime, I have not found your manual to find the wording or where to save it as a favorite connection but I am looking
If you are unable to connect to the network while plugged directly into the router, we need to figure out if the router is preventing your TV from connecting to the network. We will troubleshoot using the Modem. Depending on where your modem is located in your home, you may need to re-locate it temporairly for the troubleshooting. You will connect the modem to the TV using an ethernet(cat5e) cable. If you have cable internet, you will be able to use the closest coax wall-outlet to the TV. If you have DSL internet, you will need to use the clsoest phone hack for this troubleshooting.
Note: If you have a modem/router combo such as ATT's 2wire combo, then bypassing the linkstick is the last part of the process. Please contact your ISP for futher assistance.
How to Perform a Factory Reset for your TV.
When you are having issues with the network setup, sometimes it could be a software glitch that is preventing this process from completing correctly. The factory reset is a function which resets all values and settings to stock. The Factory Reset can resolve unforseen issues, so it's always a good thing to try when nothing else works. It is more beneficial to do this after a power cycle.
Note: Performing a Factory Reset will reset ALL values for the TV and Internet@TV/SmartHub.