Default Please help me problemsTrio Stealth g2

Hello, a while ago you buy a tablet g2 Chinese Stealth Trio my daughter, everything was fine for now the tablet does not turn off and turn on but when connected to usb sound when any USB device connected to the computer, read by all sides regarding this tablet is a clone of another tablet, would like to help me see if I can save, to revive again, because first Frozen stayed in the logo after he refused to turn over but the connect usb pressed the button off and the volume up or down and it sounds like you recognize the usb. how could revive it and thanks for your support: