I would guess you did not remove the correct screws. Take a look at these photos and see if it helps.
Once the screws are out you just slide it a little bit forward and then flip it back.
The top left hand corner shows how some sears models are. The have a cover that must be removed before you see the screw you have to remove.
Many others are like the one on the top right and are in the back corner.
Some of the screws are right up front were they are easy to see and get to.
In any case there is a screw someplace in each corner. Once remove the whole thing just flips up.
Have had a couple people on dial up connections say they have had trouble with the videos, but that's dial up for you. Some of the videos are very large files.