Connect the Laptop and TV with a *CROSSOVER* ethernet cable and then enable "Internet Connection Sharing" on the Laptop's "Wireless Network Connection".
To enable "Internet Connection Sharing", open the Network Connections folder ("Start > Run" type NCPA.CPL and click OK). Right click the Wireless Network Connection, select Properties and then the Advanced tab [XP] or Sharing tab [Vista]. Tick the box "Allow other network users to connect through through this computer's internet connection.
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