LG L226 WTQ, WT-SF bouth have the same problem

I just got LG L226WTQ, cause mine LG L226WT-SF is in reparation.I have this problem: http://www.youtube.com/watch?v=MzQtRBtrvc8 .When smth fast is going on i'm having strange lines in the correct color.They're making me crazy.I will write now to LGe electronics, cause i dont find any solution on the internet.My motherboard is m2n-e(latest bios 1202)-nForice 570i, motherboard is working ok, BFGtech 8800gts 320mb, which is indeed working great.I tested mine hardware so that i recorded a movie in .avi quality.When i checked it out, there was no line->so, mine graphic card does nothing with this.This lines are happening just in animation(over cca.40frame per second) and games(not importent which one-everywhere).

PLeas, PLeas, PLeas, I BEG YOU , HELP ME :'(