pn50c490 Internet@tv/wifi/rooting update..

[erdem_ua]

Do you reach bash command line? If you drop to bash than you can copy firmware to your USB device via dd command.

[erdem_ua]

Himm, I don't know correct offset for your TV too.
Finding correct offset is not an easy thing.
Might be some day, some hacker found way to enable it.

And I say 'dd' not 'DD', which is completely different on Unix systems.

[erdem_ua]

If TV has networking capability, than you could add required drivers to your TV for using Wifi as we make for unsupported WiFi dongles.
Just use modules at SamyGO Expansion packs.
But I think they don't compatible with your TV because your processor is MIPS instead of ARM.
At worst scenario, you needed to compile those modules by yourself.