Guys, you will not believe this:
And the kid did it again... twice.
The first time i wasn't at home and it was desastrous... almost channels lost (only 2 remain), the scan frequencies menu was gone so it was not possible to search for channels any more, start to have AV1 and AV2 when the TV only have one AV input... Tv was all F#%# up...
Tonight the kid did it again and i was abled to take a look at the menu... put the tuner mode in Philips (a shoot in the dark) change "hotel mode" to "normal mode" correct the Vertical and Horizontal posicions but there is a few other settings there that i don't know what they are.
Thinking i coun't do any worst that it allready was, i shut the tv down on power button to store the new setting. And now the TV is working fine. Everything is back, even the UHF.
I still do not know how to enter service menu in this tv, but my genious kid does :) This kid will be flying helicopters at 10 years old :)
Thanks to all of you who tried to help. Regards Amarok