thanks indeed sajjad for replying!
well dear i am an elecctrical engineer and intrested in electronics. i am fully aware of the safety requirements.
can you precisely tell me which pot number and which transistor number to check?
what do you mean by IC based transistor?
are you talking about the flyback transistor?
there is one transistor (or mosfet?) that has SDG legs instead of emitter, base and collector. what that stands for? S,D,G and how to check that