This morning I got a 1g stick of ram that was pc2100 which is what my computer takes. I put it in my computer and when I booted up, my computer would beep 4-5 seconds long at 2 second intervals. I later found out that the ram i got does not work with my model. I took out the new ram so that my computer was the same as the day before. Same error. I have checked to make sure that nothing got unplugged when I was inside of my computer. This has been frustrating me severly for the past 3 hours and any help would be greatly appreciated. If you have any questions about my computer please ask.