quadcopter 250 mini motor problem

[flyboy1]

hello im having problem with 1 of the motors i'm new to this first quad build the build consist of 4 sunnysky motors 2300 kv 4 afro 12a ultra lite simonk esc 1 naze 32 fcb 1 lumenier 1300 3cell 11.1v lipo 1 Simple PDB 1 12V Step-up/Step-Down Voltage Regulator
i addad a video of what is happening when i test the motors on base flight motor 4 is not spinning just gitch or pulsing any help would be well appreciated i already replaced the esc once because it fried up and its the same problem as last esc.

 

[FFL8N]

Have you tried switching the wires from the flight controller? Tried different motors?

 

[hjls3]

have you calibrated ESCs? and what happens if you plug motor wired into diff output from naze?

 

[Bartman]

i'm sorry but i can't tell what is happening with the motors.