A1 mini developed a coil whine

Hi, I’ve had my A1 mini for about a month and half now and have absolutely loved it. Recently I noticed that when in the sleep mode the printer emits a pretty discernible coil type whine and click. This noise has only appeared in the past week from what I’ve noticed, with the printer previously being silent when in the sleep mode. If anyone has any idea about what this code be or what could be done that would be great!