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I inspected the power adapter and green light was flashing. I checked resistance of power socket of laptop which was showing just about 5 ohms. This was my first though that there is a short circuit somewhere inside the board.






As you can see I have soldered out the power socket and some components. The main fault was short cirquit between two layers near power socket. By the way this PCB is with 4 layers. I stripped down a part of first layer and in the picture you can see a second layer.