How to open a 1993 Sony XBR32 TV Back Cover?

Sony TV Model: KV-32XBR96S
I tried to open the TV back cover to find out if something is loose inside. I was able to unscrew all six screws around the edges of the back cover but when I tried to separate the back cover from the tube starting from the top, it seems the bottom part does not want to come off. What do I need to do to open the back cover so I can get access to the transistors inside the TV. If you have a diagram, it would help. Thanks, Jason