My sharp tv 21" model 21AG2-S have three colours B,G,R,horizontaly at the center of the screen, pls help .this problem occured when the tv developed horizontal line problem which was solved by replacing the vatical ic(tda 8357) and 10ohm resistor that feeds the vcc pin, i have changed most of the electrolitic caps in the main board but no solution.

SOURCE: TDA 8364

Look it up at nteinc.net

SOURCE: sony tv model no. KV - 19 APR 2

Dop you have related Service Manual?

SOURCE: sony tv model no. KV - 19 APR 2

This is for a different model, but I had thin horizontal lines in red and had to adjust the tube for red. You may have a similar adjustment on your set.

http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html

SOURCE: help me to resolve the problem

The problem of resistor of keep blowing caused by surge voltage,look for capacitor associated that resistor.The capacitor hold the voltage and distribute the exact volatage to that resistor if that capacitor is shorted or leaky,that is the caused of abnormal distribution. Also check the diode there and transistor.What is the number of IC driver you replaced,and do you have already schematic diagram?If not,i help you to give a links where you can avail.

Hope it may help you;

Regards,
VOTIT

SOURCE: Sony TV shuts off automatically

1.Check first if the shutdown of your tv follows a certain period of time. Example after using it within 12 hours it automatically shut down. If so the the matter is only on settings of your tv.
2.But if your tv shut down at an irregular time the problem is in your board. In this case if your tv still work but still shutting down automatically its better not to use it so that their will be broader damage.
3.The most common defect on this case is loss contact of components due heat and mechanical undergone during the usage of the tv. If you know how to resolder board, try to resolder the components specially those who are showing loss contact. You can recognize it because a good solder one has shinny and no round like on the soldered surface.Try also to resolder important parts such as IC's and transistors. note : a good resolder needs to be done in order to avoid problems and damage.
4.Another possible cause is the tack switch for channels,menu,power and etc. You can remedy it by spraying it a contact cleaner.
5.If the problem still going even after the procedure its better to bring it on reliable and trusted service center.