How to open a Casio FX-4000P?

[johanw]

(08-08-2021 12:39 PM)Dave Britten Wrote:  There should be a little contrast dial on the side. Same with the fc-200, and a couple other models that use that same chassis.

Ah, yes, I found it. Thanks. I was looking at some mode setting like on the 8000G.