Q: My 16×2 LCD is not displaying any characters, even though it is powered on. What could be the issue?

A: If your LCD is powered on but not displaying characters, there could be several possible issues. First, check that your connections are correct and secure. Second, verify that your code is properly written and uploaded to the microcontroller. Third, adjust the contrast potentiometer. Too low or too high contrast can cause the characters to be invisible. If all these are fine, you might have a faulty LCD.