I have a Presario 900 laptop. It will not power up or sometimes it will for a few minutes then go dead. I have 3 batteries fairly new, and 2 ac adapters (one has a led to show it is on). Last weekend it stopped working. I wanted to give this machine to my wife. It is still a decent machine. I have some electronic skills to repair it but would like some suggestions on what it might be before I rip it completely apart. Hopefully someone else has had this problem who has resolved it. Yeah old things are hold to let go.