How to correct Samsung tv to internet

Well... Yes and No... Does this set have an Ethernet port?
If so then try and plug it in that way.
Try and reset the router and tv
Make sure the connection settings are correct or defaulted
Are you entering the correct password?
Are you close enough to the router?
reset the network setting on the tv
it's possible you may have a bad wifi chip but im not thinking you do. Good Luck and come back it the above does not help we can go more into detail.
Mr.Mike

Have you entered the correct passcode / passkey this information is usually located on the bottom of your wireless router

set the ip address to be detected automatically in the tv network settings.
What you need to know is the encryption key used on the Wi Fi
If you do not know it it might be on the case of the Wi Fi access point device.
Otherwise you will need to log into the router by typing the router's ip address into an internet browser on the working computer.

If the router doesn't have a button, you will have to plug the adapter into a pc to configure it manually.

check first the samsung n145 check of the configuration of setting on it.

When you use your wireless-enabled computer far outside the range of your wireless-enabled router, you definitely will be trying to connect to a different wireless-enabled router.

That "foreign" router will broadcast a different SSID than your router is broadcasting.
Use "View Available Wireless Networks" to find that SSID, and "connect" to it.

> all of my options are ...

Correct.

check your Samsung manual it will show exactly how to set your Tv to the router.

http://www.usersmanualguide.com/samsung/tv__lcd/la15s51b

So, just to confirm:
PC via ethernet has internet connection OK?
The router IP is 192.168.1.1
The PC ethernet IP is 192.168.1.n (n is not 1)
If you unplug the ethernet cable, you no longer have a connection.

If these are correct, did you previously have wireless internet working? If so, just reboot the router (unplug its power).

If not, you'll need to check the wireless settings in the router with those of your wireless network card, making sure you are using matching security settings (WPA-PSK, AES256, matching 'key').

To access the router, browse to http://192.168.1.1 (ensure your ethernet is plugged in). If you haven't changed from the default login details, you'll find them in the router manual.

Yes you hve to setup the router again, the wireless setting especially.
Turn mac control off in wireless security and let me know how you get on.

Check CNET Samsung forum. There are several posts with the same problem. A couple solutions and basic confirmation that Samsungs newest fireware is bad. I wish their support helpdesk would realize that instead of telling me to contact my router support.