The beige model of the TI-99/4A usually has the oft-maligned post action keyboard with a membrane contact system contained within which is prone to failure. In my first blog post I was both happy and disappointed to find a couple of variants of the beige keyboard which had, respectively, the spring-leaf style contact with full square action and a non-Mitsumi model with the hated membrane contact system.

Generally the black keyboards are the full square action with spring-lead contacts. I am aware the black keyboards also came as post action models, but to my recollection I had not come across them before. Digging through storage this past weekend I found one black keyboard remaining from a bunch I was given some time back.

On the up-side, General Instruments did try to prevent this from happening.

My original post on the good beige keyboard is below.

https://atariage.com/forums/blogs/entry/12110-the-good-beige-994a-keyboard/