From The Internet - Philips 47PFL8404H/12 User Manual

4.5.1 From the Internet
In some cases, it might be necessary to update the TV
software. If your TV is connected to a router, which is
connected to the Internet, you can update the TV software
directly from the Internet. You need a high speed Internet
connection.
Close this user manual, press h > Setup > Software
update > Update now and press OK.
Select Internet and press OK.
Follow the instructions on screen.
When the update is done, the TV switches off and back on
again automatically. Wait for the TV to switch back on; do
not use the Power switch O on the TV.
If the TV is connected to the Internet, the TV displays a
message about the availability of new software at start up.