Replace the dead battery in your LG G Pad X 8.3 to restore power to the tablet.
Replace the speaker in your LG G Pad X 8.3 to restore the sound in the tablet.
Use this guide to replace the motherboard in your LG G Pad X 8.3
Replace your rear-facing camera on the LG G Pad X 8.3
Replacing the screen on your LG G Pad X 8.3.