What if the sky is red and the screen is black?

1. Check the monitor: check whether the monitor is connected correctly, check whether the monitor is faulty, check whether the power supply is normal, and check whether the brightness and contrast settings of the monitor are correct.

2. Check the computer: check whether the computer is faulty, check whether the computer's graphics card is normal, and check whether the computer's display settings are correct.

3. Reset the computer: If no problems are found in the above inspection, you can try to reset the computer, which will restore the system settings of the computer and solve many system problems.