My acer model is aspire E14, i just followed procedure with other model and it worked. My problem was no screen coming out even when the power led light is on. What i did, starting with no power, led is off, i pressed the power button for about a minute. The led on power should not come out. Hold pressed for a minute then let go. Then i press once again to turn it on, there screen has come out. And its working fine again now.