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Your TVs CRT socket is faulty. CRT socket is one that connect the base of the picture tube, and can be located on the base card of the tv. It is soldered directly to base card and can be replaced. Unplug the base card from the picture tube neck [Caution: never damage the neck of the picture tube. Only slight pressure should be applied], desolder it out and replace it with a similar type.
Convergence ICs are STK392-110 you will need two of them they are available at the link I am posting and they give free instalation instructions with pics and free tech support so you can do the repair yourself.Heres the link. http://servicemanuals.vstore.ca/
have a sansui tv with a date of sept 2002 i bought the tv because it was on sale and have since lost the reciepts. anyways , no i need the tv and when powered up there is no picture but the sound comes on fine. i turnd it upside down and beat it and shook it and the pic came on for a min only to turn back off in 5-6 minutes. help. oh and i dont have electrical or circuit knowledge but willing to change a bulb or fuse.
as you say that sound is ok and picture also comes some time so please check loose contact in luminance section of chroma ic .
weak signal may cause rolling and intermittant picture problem for that checkloose near antena socket