[QUOTE=cholla;2580012]Just a quick warning that was left out . Unplug your computer from any power before opening the case. Then make sure to touch the case to ground yourself or do so with a static strap. Then check the connections to see if they are OK.
Then plug your PC back in .It is ok to leave the side off for this just don’t do anything inside while it is plugged in.[/QUOTE]
Excellent advice, especially for somebody who’s new to the isides of their PC. I can’t believe I forgot that! :o
[QUOTE=jbhbtb;2580018]Thanks again! So, I have unplugged, grounded and unscrewed, but the sides don’t want to come off. There are only actual screws at the back and then “divets” on the underside. The sides almost feel like they are glued on. Do I have to pull really hard or is there a trick to maneuver them off?[/QUOTE]
Sounds like your tower case could be slightly different to mine, although we own the same model. Any chance you can find a pic online of your PC case or take a quick pic with a camera or your mobile?
With mine, once I undo the screws, the sides of the case slide from front to back to get them off. I’ll try and grab a pic of mine in the meantime. 
EDIT: Here’s a pic from the net, this is the one I have
