How do I fix nothing working but contrast?

When the calculator turns on, the only function working is changing the contrast. You can put the contrast up and down, but you can't see anything being entered at any contrast. It seemed like it was the buttons, so I cleaned it, but it didn't seem to work.

Diese Frage beantworten Ich habe das gleiche Problem

Ist dies eine gute Frage?

Bewertung 0

Kommentare:

Try cleaning the keys with some kind of brush! (E.G: Toothbrush)

von

Einen Kommentar hinzufügen