If your tablet seems to be working but the display is off, there could be several potential issues at play. Here are some possible reasons and troubleshooting steps:

1. Battery Issues

• Possible Problem: If the battery is low, the tablet might be on but not lighting up the screen properly.
• Solution: Charge your tablet for at least 30 minutes and then try turning it on again.

2. Display Settings

• Possible Problem: The brightness might be set to the minimum, making it appear as if the display is off.
• Solution: Try adjusting the brightness. Look for brightness control buttons or try adjusting it through your settings (if you can see anything on the display).

3. Software Glitches

• Possible Problem: A software bug might be causing the display to malfunction.
• Solution:
  • Soft Reset: Hold down the power button for about 10-15 seconds to perform a soft reset.
  • Hard Reset (only if a soft reset does not work): For many tablets, holding down both the power button and the volume down button for about 10-15 seconds can perform a hard reset. Refer to your tablet’s manual for specific instructions.

4. External Damage

• Possible Problem: Physical damage to the screen could cause it to be off or not function properly.
• Solution: Inspect the screen for any visible cracks or damage. If you find any, you may need to have it repaired or replaced by a professional.

5. Internal Connections

• Possible Problem: Internal connections could be loose.
• Solution: This usually requires professional help. Taking apart a tablet yourself might void the warranty or cause further damage. Consider contacting the manufacturer’s support or a professional repair service.

6. Hardware Issues

• Possible Problem: There might be an issue with the internal components like the display or motherboard.
• Solution: This also generally requires a professional repair service for diagnosis and repair.

7. Overheating

• Possible Problem: Overheating might cause the display to turn off to protect the hardware.
• Solution: Let the tablet cool down. If it appears to be excessively hot, place it in a cool, shaded area and let it sit for a while before trying to turn it on again.

8. Update or Firmware Issues

• Possible Problem: Recent updates or corrupt firmware might cause the display issue.
• Solution:
  • If accessible, enter Recovery Mode (usually pressing a combination of the power button and volume button) and try to reset or restore the tablet.

9. External Devices

• Possible Problem: Connected external devices might interfere with the display.
• Solution: Disconnect any external devices such as keyboards, chargers, or USB devices and see if the display comes back.

If none of these steps resolves the issue, your best bet would be to contact the tablet’s customer support or take it to a certified repair center for further diagnosis and repair.

If you have any specific make and model for your tablet or additional symptoms, feel free to provide more details for a more tailored troubleshooting approach.