Last night my not quite 2 year old Inspiron 5559 turned off unexpectedly. It has not turned on since. I have tried removing the battery, holding down the power button for up to a minute, put the battrey back in, then tried the power again. No results. The laptop is not turning on at all. It had full battery at the time as I was running it plugged in. Any suggestions? I have a lot of information on this that I need to access.