HP25 keypad problems

[GreyUser]

Use the de-oxit d100 and apply more than once if needed. If, after two applications, it still isn’t right, you can fashion a miniature wire brush and clean the contacts with it as described in post #2 of this very old thread in the archives. Substitute D100 for the isopropyl. This is the last resort before busting it open, something you should not rush into, it will never be the same.

https://www.hpmuseum.org/cgi-sys/cgiwrap...5511#55511