But if you are a bit risky and you have fully functional u-boot ( i see you have restored your u-boot with right one - you always can repair your TV if something fails), i suggest you to do only step3 from this manual: flashing firmware i attached there, changes kernel on your TV with one from arris69 with network support permanently.
If you can`t boot TV after that (im almost 100 sure that everything will be good), you restore TV easily, i can guarantee it for you (off cource if you follow instructions
