Please excuse the ms paint style
Please excuse the ms-paint style screenshot, but this should hopefully help. View from the top of the board, the red and blue lines should all be connected as shown. My guess is that the left connections will be there, but the final one on the right is broken for each row. No sweat, as this can happen sometimes during soldering or through wear and tear. The good news is: they're totally repairable and can be made manually with a thin wire 🙂
