Take lots of photos!

I called this the frame because it literally holds everything in place. As you lift this there are a number of small parts that will try to escape/move/hide. You have been warned.

Before we get there, we need to remove 3 more screws.

one is hidden almost centrally to the main body, but there should be enough length in the ribbon cable to allow access. If you can't get to it, try releasing the power port (shown floating free in the photo) and you ought to be fine.

Another is on the left hand edge and was previously concealed by the PCB.

The last one is down the bottom end near the batteries and should pose no problems at all.

Now, carefully lift the frame and PCB away. In the photos you can see a blue circled wheel, this is one example of a component that is supported by the frame we are removing, make a note of thing like the spring clip.