Onida, 32"XariaLCDTV
TV goes off its on after working for some time

I purched 32"LCD TVon12/11'for the last 3 moth it is giveing

problum. TV goes off after some times.service center people chaged power bord 10 time.changed allmost all component. They took the tv on12/8 they tried thiar best.still it is with them (service center)' My first complait is not yet resolved. As thay done lot of work on it. I want it shoud replaced with brand new tv.