@nick@jayeff problem solved !! I called many technicians asking for them to do a home service. But they couldn't come plus they all came to a conclusion that my ic or mother board is at fault and need a checkup. But i refused to belive it since there was no burn or any kind of incidents related to it. So i used a hair dryer and cleaned each and every neck of the mother board. and wola!! He came like a genie. Thanks for your response and giving some suggestions