How come my Fujitsu Lifebook hangs on start up since I upgraded the RAM?

Episode 935 (14:30)

Carlos from Southern California
Fujitsu Lifebook

Leo suggests removing the secondary memory and going back to the way it was before. Then try booting it. Since Carlos already did that, it may be more permanent damage that has occured. Unfortunately it may be time to take it in or get a new laptop.