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The Bad Black 99/4A Keyboard

Posted by OLD CS1, 11 December 2017 · 283 views

The Bad Black 99/4A Keyboard

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.
 

Made by "General Instruments | Keyboard Division" (upper-left, poorly exposed)

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Keyboard post

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

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My original post on the good beige keyboard is below.
 
Entry
The good beige 99/4A keyboard
Last Update Jun 23 2015 8:42 PM