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Difficulty: MediumLaptop Display Components and Features

An IT technician is servicing a convertible laptop where touch input stopped responding completely after a minor drop, and wireless network connectivity drops intermittently whenever the display hinge is moved. The screen image itself remains sharp and fully functional. Which TWO of the following display assembly components should the technician inspect or replace to resolve these symptoms?

  1. Digitizer panelAnswer
  2. Wi-Fi antenna harnessAnswer
  3. C
    Backlight inverter board
  4. D
    Main display video ribbon cable (eDP cable)
  5. E
    Webcam module

Answer

The technician should inspect or replace the digitizer panel and the Wi-Fi antenna harness.
The digitizer panel is responsible for capturing tactile input on touch-capable laptop screens, explaining why touch responsiveness failed after a drop while the visual display remained functional. Wi-Fi antenna wires are routed through the display hinge into the upper screen enclosure to maximize wireless signal reception; damage or pinching of these wires inside the hinge causes intermittent wireless drops when moving the screen lid.

Step-by-Step Solution

1
Analyze the touch failure symptom
Identify that touch input conversion is handled by the digitizer panel layer in the display assembly.
Loss of touch functionality while visual output is unaffected indicates a damaged digitizer or loose digitizer flex connector.
2
Analyze the wireless signal disruption upon hinge movement
Identify that Wi-Fi antenna cables route through the laptop display hinges into the top display housing.
Intermittent Wi-Fi loss during lid movement indicates pinched or damaged antenna wires inside the hinge assembly.
3
Rule out unrelated components
Confirm that the main video cable, inverter board, and webcam module are not responsible for touch input or Wi-Fi signal loss.
The screen image is working normally, ruling out video cable issues, and backlighting/webcam components do not process touch input or wireless RF signals.

Key Concept

Laptop Display Assembly Components and Symptom Diagnosis
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Topics

Laptop Display Components and Features

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