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Zorluk: OrtaMobile Device Ports and Accessories

A technician is configuring a smartphone for an executive who needs to connect the phone directly to an external HDMI projector using a USB Type-C cable. While the phone charges successfully when connected to the projector's USB Type-C port, no video signal is detected. Testing the projector with a laptop confirms the projector and input port are working properly. Which of the following is the most likely cause of this issue?

  1. The USB Type-C cable being used only supports USB 2.0 data and power delivery, lacking support for DisplayPort Alternate Mode.Cevap
  2. B
    The mobile device's USB Type-C physical port must incorporate a dedicated Thunderbolt controller to output any display signals.
  3. C
    The Mobile Device Management (MDM) software installed on the phone has wiped the display driver configuration to protect enterprise data.
  4. D
    The smartphone requires an active background cloud synchronization session before peripheral display hardware can be initialized.

Cevap

The cable being used only supports power delivery and USB 2.0 data, lacking support for DisplayPort Alternate Mode.
USB Type-C ports use DisplayPort Alternate Mode to output video signals to external displays. This functionality requires a USB-C cable that contains internal high-speed data lanes. Standard power/charging cables frequently include only power conductors and basic USB 2.0 data lines, preventing video signals from reaching the display.

Adım Adım Çözüm

1
Analyze reported symptoms and hardware behavior
Power is transmitted successfully over the cable, but video signaling fails.
Charging success verifies physical connection and power pin continuity, isolating the issue to data lane capability.
2
Evaluate USB Type-C feature support requirements
Video transfer over USB Type-C depends on DisplayPort Alternate Mode (Alt Mode), which requires specific internal high-speed data wiring within the cable.
Many standard charging cables omit high-speed video lanes to keep manufacturing costs lower.
3
Determine corrective resolution
Replacing the current cable with a fully featured USB Type-C cable rated for DisplayPort Alt Mode will allow video output.
A fully featured cable provides the necessary physical pin lanes for Alt Mode negotiation.

Anahtar Kavram

USB Type-C DisplayPort Alternate Mode and Cable Wiring Constraints
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Konular

Mobile Device Ports and Accessories

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