I can repair myself the Amiga keyboard o i should a new keyboard?

[orange]

you mean you cut the graphite traces? tsk tsk tsk..
repair will cost more than new-second-hand-one (liquid silver is pricey and those keypad repair kits cost $$$)
cheapest: ebay A1200 keyboard
better: PC keyboard adapter (vesalia? amikit?..)
best: make your own PC kbd adapter if you are skilled enough, instructions on aminet, but be warned its not easy as A500 kbd ..

[orange]

well me want one too...   :-)
they are expensive just because there is demand. I think they are very similar in design like the ones on aminet hard/hack,
i.e. they use some (cheap) microcontroller like PIC16f84.
If you, by any chance, decide to build one, my
site will help you a bit..
check ebay regularly.. thats all I know

[orange]

I think uncleted is right. maybe you should contact the author. I made PCB long time ago and can't remember all the details..

[orange]

2) There work perfectly on Amiga games or so?

well not entirely, there is a problem of multiple key-presses   but I'm not sure if its because of PC keyb or adapter or both..
also there could be some other small problems with reset, delays etc.. IIRC