When a tablet refuses to turn on, it can be a cause for concern, but there are various troubleshooting steps you can take to try and revive it:

1. Check the Battery:
  Ensure that the tablet has sufficient battery power. Connect it to a power source using the original charging cable and adapter. Leave it charging for at least 15-30 minutes before attempting to turn it on again.

2. Inspect the Charging Cable and Port:
  Examine both the charging cable and the charging port on the tablet for any signs of damage or debris. If the cable is frayed or the port is obstructed, it might hinder proper charging. Use a different cable or clean the port if necessary.

3. Perform a Hard Reset:
  If the tablet remains unresponsive, try performing a hard reset. This typically involves holding down a combination of buttons (usually the power button and volume down/up) for 10-15 seconds. Consult the tablet's user manual or the manufacturer's website for specific instructions based on your tablet model.

4. Try a Different Power Source:
  Change the power source. If you were using a wall outlet, try a different one. If you were charging through a computer, use a wall adapter. Sometimes, the power source can be the culprit.

5. Inspect for Physical Damage:
  Check the tablet for any physical damage, such as cracks or water damage. Physical harm might be preventing the tablet from functioning properly. If you find damage, you may need to seek professional assistance.

6. Connect to a Computer:
  Connect the tablet to a computer using a USB cable. If the tablet is recognized by the computer, it suggests that the issue may be related to the tablet's display or power button.

7. Boot into Recovery Mode:
  Some tablets allow you to boot into recovery mode. This mode can be used to perform system updates or factory resets. Consult the tablet's manual or manufacturer's website for instructions on entering recovery mode for your specific model.

8. Check for Software Issues:
  If your tablet was recently updated or if you installed a new app, it could be causing software conflicts. Try booting the tablet into safe mode (if applicable) or perform a factory reset to eliminate software-related issues. Note that a factory reset will erase all data on the tablet, so use this option as a last resort.

9. Update Firmware:
  If the tablet is responsive when connected to a computer, check for firmware updates. Install the latest updates to ensure your tablet's operating system is not the cause of the problem.

10. Contact Manufacturer Support:
   If none of the above steps resolves the issue, contact the tablet's manufacturer for assistance. They may provide additional troubleshooting steps or recommend sending the tablet for repair.

Remember, if the tablet is still under warranty, it's advisable to consult the manufacturer's support for guidance or to explore warranty-related solutions. If not, seeking professional assistance from a reputable service center might be the next step.