If you’re experiencing a backlight issue on your MacBook Pro M1 (13-inch) from 2020, where the display remains black or dim, there are several steps you can take to troubleshoot and potentially resolve the issue:

1. **Restart Your MacBook**: Sometimes, software glitches or temporary issues can cause display problems. Try restarting your MacBook Pro to see if the backlight issue resolves itself upon reboot.

2. **Adjust Brightness Settings**: Use the brightness keys on your keyboard (F1 and F2) to adjust the brightness level of your display. It’s possible that the brightness settings were inadvertently adjusted or set too low, resulting in a dim or black screen.

3. **Check Power Connection**: Ensure that your MacBook Pro is properly connected to a power source. If the battery is critically low or the power connection is unstable, it may affect the backlight functionality.

4. **External Display Test**: Connect your MacBook Pro to an external display using a compatible cable or adapter. If the external display functions normally, it suggests that the issue may be with the internal display or backlight components.

5. **Reset NVRAM/PRAM**: Resetting the non-volatile random-access memory (NVRAM) or parameter RAM (PRAM) can sometimes resolve display-related issues. Restart your MacBook Pro and immediately hold down the Option, Command, P, and R keys simultaneously until you hear the startup sound again.

6. **Run Apple Diagnostics**: Apple Diagnostics can help identify hardware issues with your MacBook Pro, including display-related problems. Restart your MacBook Pro and hold down the D key until the diagnostics utility launches. Follow the on-screen instructions to run the diagnostics test.

7. **Seek Professional Assistance**: If the backlight issue persists after trying the above steps, it’s likely a hardware problem that requires professional repair. Contact Apple Support or visit an authorized service provider to have your MacBook Pro examined and repaired by trained technicians.

8. **Check Warranty Coverage**: If your MacBook Pro is still under warranty, display-related issues such as backlight problems may be covered for free or at a reduced cost. Check the warranty status of your device and consult with Apple Support for assistance.

By following these steps and seeking professional assistance if necessary, you can effectively address backlight issues on your MacBook Pro M1 (13-inch) and ensure optimal performance of your device’s display.