HP 35s bad keyboard

[Marcio]

The first 35s I bought had this very same problem with the division and the ENTER keys. It drove me nuts. It was a huge let down for me as I simply can't trust a machine that misses keystrokes. I hate having to check the screen to see if the data was actually registered. So I got rid of it and bought a new one, which seems to be working as expected.

Anyway, although I sympathize with your bad experience, I don't think that is a common occurrence.