Just to be sure that the green circuitry foil is broke (even though might be repaired), try to exchange the conductive pads with other functioning keys. I know it's a pain in the ### (30 tiny screws on the back of the KB) but you should try this. A quick test of the keys is on the "Early Startup Menu", by pressing one key after another: if the key is OK the mode changes from Pal to NTSC.
You may also find me on GrNET (eu.irc.gr, gr.irc.gr or
http://www.irc.gr for more info), #AmigaHellas ;-)
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