monome

do any of them just not turn on ever? you'll need to reheat the solder.

what computer are you using? are you using a hub?

does the pattern change each time you toggle the "all" on? does it work correctly when you just push the keys to toggle LEDs individually on/off?

I'm using a macbook pro, no hub.
Solder reheated, now all led turn on/off correctly clicking on "/led/all".
The problems now are:
- pressing a button turn on other buttons in the same column (this is happening with a couple of buttons).
- nothing happen pressing some buttons, but they turn on clicking on the grid in monome_test

What could be wrong? Thank you for your patience.

you have too much solder on your LEDs-- it's connecting to the keypad pattern. remove some of the solder on pads where this is happening.

Yes, too much solder.
Now it's working fine!
Many thanks