Final answer:
The malfunctioning component is likely the accelerometer, which is responsible for screen orientation changes on a mobile device. Checking auto-rotate settings and potentially seeking professional repair are suggested steps if the problem persists.
Step-by-step explanation:
If the screen on your mobile device is not changing position when you move it, the component that is likely malfunctioning is the accelerometer. The accelerometer is a sensor that measures the tilting motion and orientation of the phone. It allows the device's screen to rotate automatically when you turn the phone from portrait to landscape mode, or vice versa.
Other potential issues that could cause this problem include:
- Software glitches or bugs
- Disabled auto-rotation settings
- Physical damage to the sensor
If a quick software check in your settings doesn't fix the issue, you may need to contact tech support or take your device to a professional for repair or replacement of the malfunctioning sensor.