Since then color patches are observed on the screen and the picture also appears to be tilted, but samsung service engineers reply was all the tv sets looks to be tilted. Atleast this kinds of reply I do not expect from the service peoples of such a brand item in the market which is selling tvs with tilted pictures. I think might the service engineer is not competent to handle such typical problems or he is not so technically sound. Very poor service from samsung.
Fyi the yoke of the tv set was changed during warranty and the warranty is still applicable.