White Lines in picture

This is a retrace blanking problem. Probably, the Vg2 voltage is too high, so the cut-off point from the picture tube is not correct. Try to lower this voltage. On most common flyback trafo's it is the lower adjusting screw (plastic kind of button) which is used to set the Vg2 voltage. Turn it a bit CCW until the white lines disappear.

It is a calibration problem, let me see if I can find some schematics for your tv.

it sounds like it could be either the T con board or an issue with the Tab Bond on the screen itself.

We have a Samsung LE32A457, whilst we were watching T.V tonight the top halve of the screen suddenly appeared with green lines halfway down the screen and that half of the picture was unwatchable, T.V is 2 years old. We have removed all scart leads but this did not help and the problem still exists, when shutting down a white horizontal line across the centre of the screen appears from this line upwards the picture is faulty. Any help or advice would be grateful.

sounds like bad capacitor in vertical circuit. It's not a hard fix if you know where to look. Repair shop should not have hard time repairing it.

The red picture tube is bad, you must replace before it cause damage to the boards.

Are they thin, white lines running east to west? If so, they are called retrace lines and indicate that the screen settings for the picture tubes is set too high or there may be a mal-function of the CRT driver circuitry. Try adjusting the screen controls which are located behind the front grill of the TV behind an access panel. Once you remove the grill and access panel, you'll see a small control assembly the has two sets of controls. Three for adjusting the red, green, and blue focus, the other, the red, blue, and green screen controls. To adjust correctly, put the TV on an unused input(dark, blank picture) and adjust until there are no visable retrace lines or color in the image.

michtech

Hi

what line started? from Left to right? or from top to bottom?

Thanks!

if these lines are just at the top of the picture then i would suspect an electrolytic capacitor in the vertical circuit.

Sounds like the flyback transformer is bad. couple of 100 dollars if it is that