Answer to: charging Tablet and 5 minute or less I have to charge againYou should replace the battery.
Answer to: Why does my tablet have no sound?Make sure that you don't have anything plugged into the headphone jack. Also, metal debris in the headphone jack could short out the jack and the device will believe you have headphones plugged in.
Answer to: Why won't my tablet power on?The battery might need to be charged or the battery could be broken. Try turning on the device while it is plugged in. If it turns on then you might need a new battery.