Pololu A4988 trouble

Hi, i have trouble with one of my pololu A4988 stepper drivers (mounted on a sanguinololu board on a RepRap 3D printer). I get a loud "clicking"

noise from one of the steppers, and it seems to be coming from one particular pololu, i have tried switching motors and the sound moves to the new motor, and tried switching places of two different pololu A4988 and it always stays with the same A4988 driver.


What do you have the driver’s current limit set to? Can you post a picture of the driver that lets me see the solder joints?

- Ben