I've just closed laptop down, it went in sleep mode and when i tried turning it on few hours later, it wasn't working. When i press power button, I get a sound like it starts turning on for a second, LED lamp flashes for a second and thats it. I've tried getting battery out and holding power button(electrical discharge) but its still not working. Laptop is fully charged and LED lamp is on while laptop is on charger. I've also tried reseting it via small button on the back of the laptop. I don't think that motherboard is dead as i can charge my phone via USB 3.0 port. Any ideas what could it be?
I've also opened it up and all capacitors on motherboard looks good.

