Dell Latitude 7420 - Safety precautions; Electrostatic discharge-ESD protection

1. Microphone array 2. Power button (optional with Fingerprint reader)
3. Keyboard 4. Touchpad
Display
1. Proximity sensor (optional) 2. IR emitter (optional)
3. RGB or IR Camera (optional) 4. Camera shutter
5. Camera status LED 6. IR emitter (optional)
7. Ambient Light Sensor (ALS) (optional) 8. LCD panel
9. LED indicator
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