Hello! I am a proud owner of lousy Dell Inspirion 4150. I say this because I think I am the only person with this problem. When I want to power it up, the only thing I could see is just empty screen, some noise coming from laptop, like its struggling to wake up but coma! Nothing at all! I have called the Dell support and they said it is probably due to the motherboard.
Hi there! You are not the only soul with this problem. Solution lies in changing or repairing your motherboard. If you still have valid warranty you should be heading to their official service. I am not sure but you havent said. Have you tried replacing the battery with new one? Have you tested is there something wrong with the power cord?