Hi Walla. I have come across a similar issue with 2 Lenovo Ideapads in the last 2 weeks. Remove the installed ram stick and the laptop should turn on. It is either the ram that has gone bad or the ram slot itself. With the 2 laptops that i dealt with, one was the ram slot that had gone bad and the other the black metal shield that was screwed over the ram. When i removed this shield the laptop powered up fine.