Hi Gordon,
I think your cut was the problem and you need to restore the solder bridge. That "resistor" that you cut free seems to be the capacitor C6, right next to R5. So it should be connected to VDD. Your bridge only reinforced an already existing connection.
This is the schematic of the original Pololu-driver: [b.pololu-files.com]
Your modules seem to use the very same part numbering.
Hope that helps,
Michael
I think your cut was the problem and you need to restore the solder bridge. That "resistor" that you cut free seems to be the capacitor C6, right next to R5. So it should be connected to VDD. Your bridge only reinforced an already existing connection.
This is the schematic of the original Pololu-driver: [b.pololu-files.com]
Your modules seem to use the very same part numbering.
Hope that helps,
Michael