I am trying to take apart an HP 6 LaserJet printer. There is half a sheet rolled around a roller that is not accessible. I found a couple of sites detailing how to take apart the printer. They both refer to 4 "tabs" on the bottom to be released. I can only find 3. When facing the printer it is the right front corner that is the problem. It SEEMS to be attached to more than just the cover. Any suggestions? I can find NO picture to help that looks like my printer. THANKS