Questions & Answers for: Texas Instruments ipa

...the 'carbon' based contact points. If you are able - take the calculator apart - and use some IPA (Iso Propol Alchohol) to clean thorougly - LINT FREE Cloth. In fact - you will not do anymore ...

...where the buttons are there will be some meandering gold or carbon tracks, clean this area with IPA or something similar, you can use nail varnish remover, then clean the back of the button with ...