You should try fully recharging the speaker if it fails to turn on. It’s also possible that some components of the speaker are not set up properly, or one of your connected devices may have caused an issue with the speaker. Disconnect all devices that you may have used with the MegaBass, then recharge the speaker and try to power it on again. If this fails, then another problem may be present with your product. Call or email us at support@tzumi.com or 1-855-GO-TZUMI for further assistance.