Known TI models with key bounce issue?

[matthiaspaul]

(01-25-2017 06:05 PM)Maximilian Hohmann Wrote:  Absolutely worst of all is the slanted LCD first generation series. [...] The very worst of them is the "Jeppesen Prostar" [...], an aviation calculator. I have two or three of them in my collection and not one of them can be used to calculate "1+1="... Given that these specialised calculators were quite expensive then, this is really annoying.

At some point in time Texas Instruments ran an exchange programme for the whole series at least over here in Germany - you could go to authorized dealers and choose a free replacement calculator from about the same price level - even if the original calculator was long out of warranty. However, for some calculators they didn't have suitable replacement models. I remember that I had to replace my TI-54 by a TI-56, which brought some additional functions, but lacked others for which I had chosen the TI-54 originally...

Greetings,

Matthias