Faulty Power Adapter Check to make sure the power adapter is plugged into the wall completely. If it is, make sure the light on the adapter is on. If the adapter light is not on but it is plugged in, this likely indicates that the adapter is faulty. Consider purchasing a new power adapter. Faulty Battery If the adapter is still working, check to make sure the charger is plugged into the tablet completely. If the tablet will turn on with the adapter plugged in but not while unplugged, regardless of charging time, the battery is faulty. Follow this guide to replace the battery. Source: Axess TA2513-10WT Troubleshooting

Distorted External Sound Within settings, check to make sure the balance of the speakers is even. The Left audio should be about the same setting as the Right audio. If this doesn't work, the speakers may need to be replaced. Follow this guide. No Sound From the Speakers Check that the volume is not too quiet or even muted in settings. It is possible that if you are in a specific application, it has specific sound settings as well. To check this, open another app, such as the music application and see if there is sound when the music is playing. If there continues to be no sound, the speakers may need to be replaced. Follow this guide. Source: Axess TA2513-10WT Troubleshooting