I just bought my wife a used 2014 cx5 with 13k miles. We are having a strange problem with the radio. About 50% of the time the radio has a very high pitched whine and very bad reception on all stations. The high pitched whine goes away whenever it picks up an HD signal. The other 50% of the time it sounds great, even when no HD signal is available. Has anyone else had this problem? Is there anything I should check?
