[Resolved]  Sansui — black screen

Address:

Firozabad, Uttar Pradesh

am turning on the power to the tv set and aerial is conected i am getting a good signal but the picture will only stay on for about 10 seconds and then i get a black screen but all sound to tv program i can still here when i try to bring up a menu button i can not see it as the screen is black i have un plugged it all and left for 5 minutes and tried to put it on again same thing happens please can u help