We have isolated this issue to two model numbers that can be found on the guitar's packaging. The numbers are 95065 and 95055. We are asking that customers who puchased their items from a retailer perform an exchange with that respective store (for a model number other than the defective two listed above). Customer's who purchased through our online story can complete an rma request for their defective item and we will exchange it for a fully function guitar controller. We do apologize for the inconvenience and will [resolve] these matters.