What common visual signal indicates that a laptop is connected to power?

The indication that a laptop is connected to power is most commonly represented by a solid or flashing LED that shows the charging status. This LED is typically located on the laptop's case and changes color or blinking pattern to convey the status of the battery and whether the laptop is receiving power. When the laptop is plugged in and charging, the LED usually lights up solid; if it is fully charged, the LED may change to a different color or turn off entirely.

Visual signals such as the charging status LED are essential for quickly assessing the power connection without needing to interact with the system. Users can rely on this distinct visual cue to understand if the laptop is receiving power and if it is charging, enabling more efficient use of the device.

Other options might provide information related to the state of the laptop but are not reliable indicators of power connection. For example, a blinking LED indicating sleep mode does not necessarily signify that the laptop is connected to power; several laptops might enter sleep mode regardless of their power status. A message on the screen could offer various operational notifications but is not a direct visual cue of power connection. Lastly, the laptop fan turning off does not provide any information about power connection and may occur during different operational states, making it a misleading indicator in this