SO3: Grbl hex values

Hi everyone don’t know if this was discussed on here I could not find it but I am trying to flash arduino with j tech hex file for a pwm lazer it says everything went threw OK after flashing with x loader but the shapeoko 3 dose not move or jog just very just makes a wierd noise and I checked grbl settings $$ they are all to default . then I flash grbl .09j back and it runs fine again just without the pwm ? Any suggestions ? Thank you again