I've had this situation and the fix varies with the failure. Your new tech may exclaim that no one has had this issue and if that is true, then you get to explore your new, unique failure.
my laptop wont turn on but when i press the power on button, it light up for awhile like 3 seconds and it off by itself (only the light bulb icon light up). tried taking of the battery and use the charger only but still the same. have tried a lot of ways like taking out the battery and holding the power button for 1 minute and still doesn't work been using it for 1 year already. been doing research on the internet, so far no one had this situation. Anybody can help me?