Be there or be square. 52 speakers can't be turned on

the boot program is missing. Be there or be square 52 speakers can't be turned on because the boot program is lost, so it doesn't work. Be there or be square SK52 stereo supports AUX audio input, and can be connected with Mp3, Mp4, notebooks and other devices. It can also be connected with guitars and other musical instruments through audio input, and it can play and sing by itself, which is more interesting and has a calm but not heavy appearance.