The Dell Latitude D620 notebook computer has a small lens below the display. You might initially mistake it for a built-in webcam. However, the lens senses the ambient light in the computer's environment. The Latitude D620 has no integrated webcam.
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Ambient Light Sensor
The ambient light sensor adjusts the brightness of the display automatically as environmental lighting conditions change. When you use the Latitude D620 for the first time, the ambient light sensor is turned off. You can enable it by pressing the "Fn" and left-arrow keys simultaneously. If you change the screen's brightness manually, the Latitude D620 disables the ambient light sensor.
The Dell QuickSet software allows you to enable the ambient light sensor and control its parameters. QuickSet is installed on the Latitude D620 at the factory. If you install Windows on the computer without using the included recovery disc, however, the ambient light sensor won't work unless you download QuickSet from the Dell support website and install it. Navigate to support.dell.com to locate and install QuickSet.
Installing a Webcam
Although the Latitude D620 lacks an integrated webcam, you can install an external one. Most webcams connect via USB ports, and the Latitude D620 has ports for up to four USB 2.0 devices. The Latitude D620 also has a serial port, allowing you to connect an older webcam. However, serial devices are now difficult to find. If you're using all of the computer's USB ports, you can add additional devices with a USB hub.
Purchasing a Webcam
Dell sells several webcams manufactured by Microsoft, Logitech and Sony that are compatible with the Latitude D620. The webcams available from the Dell store range in price from approximately $30 to $350 as of the date of publication. When purchasing a webcam from Dell or another merchant, look for a model compatible with the latest version of Windows.