My ac-30 Moultrie trail cam says it is busy and won't take pictures

SOURCE: moultrie D50 game trail camera won't take pictures in dark

Does the flash work? Could be flash circuit or day/night sensor.If you have another D40/D50 camera that flash works but has other problems,swap out the sensors.If not the sensor but the flash circuit then most likely one of the large charge capacitors which has to be soldered in.I use a digital multimeter with I/O capacitor test function..these caps should be about 250mfd.