Macbook Pro Won't turn on
My Macbook pro (2011) has been having troubles for the past month. It always is super slow and constantly shuts down randomly. Last night it completly shut down so I charged it. We I tried to turn it on it at first looked normal: It had the start up noise, fan and the grayish startup display. but after around ten seconds of doing that it just turns back off. Iv'e tried shining a flashlight to see if it is something to do with the diplay but i found out that my computer is completly shut down. Any ideas as to what might be going on and how to fix it??
MacBook Pro, iOS 7.0.1