CompTIA A+ Core 1 (220-1201)Mobile DevicesHard
A technician is replacing a cracked laptop screen and notices two thin coaxial cables running from the display bezel down to the motherboard area. What is the PRIMARY function of these cables?
- ATransmitting video data to the display panel
- BConnecting the webcam to the motherboard
- CCarrying Wi-Fi antenna signals to the wireless card
- DSupplying power to the LCD backlight
Show answer & explanationAnswer & explanation
Correct answer: C. Carrying Wi-Fi antenna signals to the wireless card
Laptop Wi-Fi antennas are typically embedded in the display bezel and connected via thin coaxial cables that route down to the wireless network card, since the bezel offers better signal reception than the laptop base.
Why the other options are wrong
- A. Video data travels through the LVDS/eDP display cable, not thin coax wires.
- B. Webcam data uses a separate small ribbon or USB cable, not coax antenna cable.
- D. Backlight power is delivered through the display's own cable, not coax antenna wires.
Wi-Fi Antenna Cables
Thin coaxial cables that route wireless signal from antennas embedded in the display bezel to the Wi-Fi card in the laptop base.
- Usually black and white/gray coax pairs
- Must be reconnected carefully during screen replacement
- Antennas placed in bezel for better reception away from metal chassis
Memory trick: Thin coax wires whisper Wi-Fi from the bezel to the brain.