Powerbook Duo 280c + Accessories Maintenance

ok, one keyboard messed up 😂..

IMG_6971.jpg IMG_6972.jpg

maybe I overdid the tracing, whatever, it doesnt work anymore.

thinking about the actuall (stupid) physicality behind the usage of two foils over another, the thing that is making the contact actually is the ring inside the rubber dome ..I think.
havent taken a photo of it, but inside the rubber dome seems to be a contact ring ( maybe with a conductive paint of some sort), so using th conductive paint there also is an option

this guy used a pencil eraser to clean the traces

Bildschirmfoto 2026-02-25 um 13.15.47.jpg
have a second keyboard with much nicer state of the foils but multiple rows are not responding..checking the ribbons again
 
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