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Zorluk: OrtaMobile Device Hardware and Display Issues

A field technician is configuring a newly deployed 2-in-1 mobile laptop for an executive. When connecting a high-resolution external monitor to one of the laptop's USB Type-C ports, the monitor reports 'No Signal'. However, when the technician connects the monitor to a second USB Type-C port on the opposite side of the device marked with a lightning bolt symbol, the display functions perfectly. Hardware diagnostics confirm both ports operate normally. Which of the following best explains the root cause of this behavior?

  1. The first port is a standard USB-C data port that lacks host controller support for DisplayPort Alternate Mode or Thunderbolt.Cevap
  2. B
    The first port requires a firmware update because all physical USB Type-C connectors natively support Thunderbolt video signals.
  3. C
    The laptop display inverter board is faulty, preventing video signal routing through peripheral data ports.
  4. D
    The laptop battery requires a full deep-discharge calibration cycle to deliver required bus power for video transmission.

Cevap

The first port is a standard USB-C data port that lacks host controller support for DisplayPort Alternate Mode or Thunderbolt.
The correct answer identifies that while USB Type-C describes the physical shape of the port, advanced feature sets like DisplayPort Alternate Mode and Thunderbolt require dedicated host controller hardware. Ports built purely for standard USB data transfer cannot output video signals.

Adım Adım Çözüm

1
Analyze the physical ports and observed symptoms.
One USB Type-C port fails to output video while another marked with a lightning bolt icon functions properly.
USB Type-C is a physical connector shape, whereas DisplayPort Alternate Mode and Thunderbolt are protocol specifications requiring dedicated host controller hardware.
2
Compare port feature capabilities based on device specifications.
The port with the lightning bolt symbol supports Thunderbolt/DisplayPort Alt Mode, whereas the unmarked port connects to a standard USB data controller.
Manufacturers frequently mix standard USB data ports and Alt Mode / Thunderbolt ports on mobile devices to manage motherboard lane bandwidth and component costs.
3
Determine the root cause of the missing video signal.
The standard data port cannot carry display protocols regardless of driver updates or power settings.
Without hardware-level DisplayPort Alt Mode routing from the GPU/system controller, external display signals cannot be transmitted.

Anahtar Kavram

USB Type-C Physical Connector vs. Protocol Standards (DisplayPort Alt Mode and Thunderbolt)
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Konular

Mobile Device Hardware and Display Issues

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