Welcome to bleepingcomputer!
When your computer boots, do you hear any beeps - what your are listening for are beep codes that may follow a pattern - ex. long beep... long beep... short beep. Are you seeing anyerrors displayed during the time the display comes up. Also check the keyboard lights. It is normal for them to flash once when the keyboard intializes. Are they flashing in a pattern?
Last question... How old is the computer? If you will face an issue where you want work done under warranty, I wouldn't advise you opening the case... especially if the guy is going to be hard to deal with. He may try to refuse to do work becuase someone went inside.
If that won't be an issue, try reseating the memory and make sure everything is plugged in and snug. Be safe... unplug the computer first, and touch the bare case to make sure you discharge static before touching a component.
Let us know what you found...
Edited by rigel, 26 January 2006 - 11:05 AM.
"In a world where you can be anything, be yourself." ~ unknown
"Fall in love with someone who deserves your heart. Not someone who plays with it. – Will Smith