Using the monome test, with the arduinomeserial running, I can now get handshakes going on. Press a button, the monome test recognises it, press the test cell to light a led and up it comes.

I do however still have a problem column. That right hand column (which I think is actually the bottom one maybe). It still doesn’t light on power up and the scrolling horizontals. And now I’m getting 1 or both led’s in the column dimly light and flicker gently when you light one from another column.

I’ve fiddled around and pulled and pushed, poked at it with a meter – but quickly came to the conclusion I have no idea what I need to be looking at.

Is there any indication from the above whether this is a board, a board edge wiring, a break off or a sheild issue?

What are the best trouble shooting steps once you get to this stage. I’m assuming I should be able to meter test A & B and that will show whether I have a short at point X.

I’m going to dedicate as much time as possible this weekend to getting this thing running – that and try and work out how to make a quick and easy temporary front panel maybe just using a sheet of ply with the correct squares drilled – need to find a decent template for that, which I think I saw the other day on the monome forums.