Compaq Deskpro EN Help!

[CommanderLiamTHX]

I have a Compaq Deskpro EN that I want to open up. It is the model that you stack the monitor on top of. I know it has two slots on the side, but here's the problem: The slot on the right side is gone. It just fell off one day. Is there any other way I can open it up?

 

[Joe C]

Go to the 2:20 minute mark of this video
Review On compaq Desk Pro EN - YouTube

you'll have to pop the button back on or look inside where the button goes to determine what needs to be pressed in to release the upper case