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Zorluk: OrtaMobile Device Hardware and Display Issues

A user connects a new external high-resolution monitor to the USB Type-C port of a corporate laptop. The monitor powers on and receives charging power from the laptop, but no image appears on the external display. Testing the same monitor and cable on a colleague's laptop results in immediate video output. Which of the following is the most likely cause of this issue?

  1. The laptop's USB Type-C port does not support DisplayPort Alternate Mode.Cevap
  2. B
    The external monitor requires a Thunderbolt host controller to accept video signals over a physical USB Type-C connection.
  3. C
    The laptop's internal display inverter board has failed, preventing signal output to secondary displays.
  4. D
    The laptop battery requires a full calibration discharge cycle to reset the display controller power state.

Cevap

The laptop's USB Type-C port does not support DisplayPort Alternate Mode.
The correct answer identifies that physical USB Type-C connectors do not universally support video transmission. Display output over USB-C requires host hardware support for DisplayPort Alternate Mode (Alt Mode). Since the monitor and cable work on another machine, the issue stems from feature limitations on the specific laptop's USB-C port controller.

Adım Adım Çözüm

1
Analyze the reported symptoms and baseline test results.
The display monitor and cable function properly on another system, ruling out peripheral or cable failure.
Isolating the issue to the specific laptop.
2
Evaluate the capabilities of physical USB Type-C ports.
USB Type-C is a physical form factor; feature support such as DisplayPort Alternate Mode (Alt Mode) or Thunderbolt data streams varies by motherboard host controller design.
Power delivery and USB data can function even if alternate video modes are not wired or supported by the port controller.
3
Determine the root cause.
The target laptop's USB-C port lacks DisplayPort Alternate Mode capability.
This explains why charging works but video signal transport fails.

Anahtar Kavram

USB Type-C Feature Capabilities and Alternate Modes
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Konular

Mobile Device Hardware and Display Issues

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