Since your tablet continues to power off immediately even after a full charge and a factory reset, the problem likely stems from a failing hardware component rather than a simple software glitch.
Here are the most probable causes as of 2026:
1. Battery Degradation or Failure
Even if the battery shows “100%” or “Full,” it may no longer be able to provide the consistent voltage required to keep the tablet running.
- Worn-out cells: Lithium-ion batteries degrade over time. A failing battery often causes a tablet to shut down immediately after power-on because it cannot handle the sudden power surge needed to boot the operating system.
- Physical Damage: Check for any “bloating” or swelling of the tablet casing, which indicates a dangerous, failing battery.
2. Loose Internal Connections
Internal cables, specifically the battery connector or the motherboard pins, may be loose or damaged.
- Physical shock (dropping the tablet) or simple wear can cause these connections to become intermittent. When you press the power button, the slight vibration or heat can break the connection, causing an instant shutdown.
3. Stuck or Faulty Power Button
A mechanical issue with the power button itself can cause “power cycling”.
- If the button is jammed or the internal spring is broken, it may be continuously sending a “power off” signal to the system.
- Test: Ensure the button has a distinct “click” when pressed. If it feels soft or mushy, it may be the culprit.
4. Overheating
If the tablet detects internal temperatures are too high—even during the boot process—it will force a shutdown to protect the components.
- This can happen if there is a short circuit on the motherboard or if the thermal paste has dried up.
Recommended Next Steps
- Boot into Safe Mode: If you can reach the home screen briefly, try booting into Safe Mode. If it stays on in Safe Mode, a specific app you re-installed after the reset is the cause.
- Try a Forced Restart: Hold the Power and Volume Down buttons simultaneously for 30 seconds to force a deep hardware reset.
- Inspect the Charging Port: Use a flashlight to check for debris or moisture in the port. Gently clean it with compressed air if needed.
- Professional Repair: Since the issue persists after a factory reset, it is highly likely a hardware fault. You may need to have the battery or motherboard inspected by a technician.