Symphonic WF 2702 has sound but no picture. The

This is usually a bad elect capasitor or a bad solder connection on the vertical IC, The capasitors will be close to the vert chip..Sometimes you can clear problem with a light tap on the TV, if so then suspect bad solder.
Charlie

loss of virtical drive ic

it sounds to me like your tube has gone , go to your local tv repair shop and order a new tube its quite cheap to do so and they should be able to get it you quite fast.

vertical output ic needs to be resoldered. careful leaving that bright line displayed on the screen as this will cause a permanent phosphor burn into the tube. this can not be corrected once burned unless you replace the tube. mch

That sounds like simple ring-cracks in the vertical circuit, most likely the vertical Ic itself... On the printed circuit side of the Tv look at the vertical Ic and examine it carefully under some magnification where each pin of the Ic solders to the board. See if you can find any cracks in those solder connections.
Bill

samsung lcd tv 40inch modle .LA 40c 53F1R negitve video and brightness high plz send id [email protected]

Hi

You have defective Vertical output IC. This parts need to replaced to back to normal.

Thanks1

is locked and forgot my 4 digital code number

Bad solder connection in the horizontal pincussion circuit.have someone resolder.God luck.4tune

YOUR brightness on the high voltage block is too high...turn it down