How can i solve the problem with my tv which is aTechnica LCD 40-270?

You could always start by letting us know what the problem actually IS!!!!!!!

You could search Google for - say - make model and two or three words to describe the symptoms.

Say "Technika LCD 40-270 Flickering screen and no audio" or maybe "Technika LCD 40-270 no sound"

You should see results fairly quickly. Maybe stuff like:

https://www.youtube.com/watch?v=QXFWKjNZu2U

http://www.badcaps.net/forum/showthread.php?t=43810

XXX
December 2015