The main issue I had was that I was following an old image for my sparkfun board to breakoff wiring. See…

http://post.monome.org/comments.php?DiscussionID=2529&page=1

That has links to the correct one from Jordan – thanks for the new one Jordan.

Once I’d reversed the way my sparkfun to breakoff was soldered it fixed most of my issues.

But I still had some issues.

After going through a million combinations of IDC cable hookups between the breakoff and the shield, I found the correct cable connections and the correct rotation of the cable. That fixed 99% of the issues.

The remaining issues I had was a missing row of lights and 2 missing columns of button presses.

The row was a single frayed wire short on the breakoff pcb from one of my sets of 4 wires. It was just touching the next solder point and that stopped the row from lighting.

The columns were due to the fact that one of my header pins wasn’t soldered. I found this one by identifying the LED ground and where it attached to the breakoff, desoldering it and then voltage checking the wire against all the associated solder points in the breakoff. That showed me that it wasn’t even getting voltage off the pin solder point, all I needed to do was apply the iron to that solder for a second and it all started working again.

That’s got me thinking it’s not my board, but back at the shield or breakoff pcb level.

First thing I’m thinking is my breakoff pcb header pins. Swap them out tomorrow.