HP 97 Keyboard issue

[jftman]

I never got the keyboard removed as in the lower pic.
The screws I did remove, checking for extraction progress are marked.

But since at receipt I had the problem intermittently should I concentrate on the screws in tge upper or lower pic?

Or more specific, if only the numbers side, or the left side in the lower pic, is nonResponsive, which screws would have the effect of some finger pressure making it work in the center of the machine while operating the keys?