dmitri wrote:1) Are you sure your keys are not reversed, i.e. left is right, up is down and etc?
2) When you enter the bootloader, choose crystal clock and press DOWN, do you see the LCD showing 'Send Sysex now'?
1) On closer examination and after re-reading the pinout, i've found that I had the buttons reversed, yes.
I don't think this mistake is the problem, read 2)
To avoid further mistakes, i've "cannibalized" (does that word exists? hehe) the buttons from the cd player I intent to use as a case. This is the result
DSC00018.JPG
2) Yes, the lcd showed "sent sysex now" when I pressed one button (I think DOWN)
I will retry tomorrow with the new keyboard
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