With a thin metal spudger you should now be able to release 4 clips along the top of the keyboard in order to lift it out.

If you find one or more of the tabs refuse to release, do not force it. You probably missed one (or more) of the screws in the bottom.

Lift the keyboard slightly from the back, disengaging its tabs along the front panel at the front. Turn it over towards you, taking care not to strain the ribbon.

Gently lift the locking bar on the ribbon socket and withdraw the ribbon. Put the keyboard aside.