LG Electronics — Led 3d tv, white patches on tv screen

Address: Kolkata, West Bengal, 700064

My led 3 d tv model no 42 lb 6200, s/n_ 501pljk 113988, while switching and in on condition one defect occuring as white patches on the screen at 2-3 places and remain on the screen. Pl identify the defect and send the engineer to my house no - eb - 115, type - 3, cpwd quarters. Sector - 1, salt lake, kolkata - 700064, landmark - city center-1. Mob no - [protected], [protected]. Name - s k suman. Tv is under warrenty.