this article is dedicated to all the lucky ones wich own a commodore SX64. but most of them may have the problem, that after some time the keyboard isnt’t responding anymore (all or some keys). In this case, the keyboard needs some cleaning. here i would like to describe you how to do this…
first of all you have to disassembly the keyboard housing. there are 4 clips on the bottom side of the keyboard which have to be gently pressed (with a flat screwdriver for example). remember, this is real old plastic, so avoid breaking this.
head on with all the screws besides the space bar. After this, lift up the keyboard and take care of the 2 screws for the connector
after this you can pop out the keybard. turn it over and start popping out every single key. this is done by pressing the clips of the keys gently (every key has 2 of them, except the space-bar witch has 4)
now you have to take away a little metal bar which fixes the connector of the black foil. In my case there was another problem -> the connector was stuck to the board and therefore slightly damaged while i took the foil off the board… but no problem, this can be fixed as described later.
next take some ear-tips and alcohol or better a window cleaning spray and start cleaning all of the metal contacts on the green board. also the connector contacts should be cleaned.
Next turn over the foil to see the black dots. clean them all. Please do this gently to avoid damage to the foil and the contacts.
next i took some graphite spray to rebuild the connector on the foil by simply applying some of the graphite to the contacts (this is the same material like the original contacts or the spots on the foil)
now put everything togehter in reverse order like described above and test the results,.. mine was working fine ! good luck !!!