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Difficulty: EasyMobile Device Ports and Accessories

A technician attempts to connect a smartphone directly to an external monitor using a USB Type-C to HDMI adapter, but no video output is displayed. Which of the following is the most likely cause of this issue?

  1. The USB Type-C port on the device does not support DisplayPort Alternate Mode.Answer
  2. B
    USB Type-C connectors are restricted by design to carrying power delivery and USB 2.0 data signals only.
  3. C
    External video output over mobile ports requires an active Mobile Application Management policy.
  4. D
    The device's SIM card slot must be provisioned with a valid IMSI to enable external hardware accessories.

Answer

The USB Type-C port on the device does not support DisplayPort Alternate Mode.
USB Type-C ports utilize Alternate Mode feature extensions to transmit display protocols such as DisplayPort or HDMI. If the physical USB Type-C port on the mobile device does not support DisplayPort Alternate Mode at the host controller level, no video signal will be transmitted to an external monitor.

Step-by-Step Solution

1
Identify the peripheral connection requirements for video output over USB Type-C.
USB Type-C ports require hardware support for Alternate Mode (such as DisplayPort Alt Mode) to output native video signals.
The USB Type-C physical connector form factor alone does not guarantee protocol capabilities such as video transmission.
2
Evaluate the reported symptom of no video signal on the external display.
The absence of video output indicates that the device's port lacks DisplayPort Alt Mode capabilities.
Without Alt Mode hardware support on the host controller, video signals cannot pass through the USB Type-C port to an external display.

Key Concept

Mobile Device USB Type-C Alternate Mode Capabilities
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Topics

Mobile Device Ports and Accessories

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