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Troubleshooting & Maintenance Flashcards

7 cards from real CPI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Troubleshooting & Maintenance flashcards as text

  1. A flat-panel display mounted on a tilt wall bracket has developed a tilt downward over time. What is the maintenance action?

    Answer: Inspect and tighten the tilt adjustment lock screws on the wall bracket

    Tilt lock screws on adjustable wall brackets can loosen over time due to vibration or repeated adjustments and must be periodically tightened and inspected.

  2. A 4K display connected via HDMI 1.4 cable only outputs at 1080p. What is the cause?

    Answer: HDMI 1.4 does not support 4K at 60Hz; an HDMI 2.0 or higher cable and compatible port are required

    HDMI 1.4 supports 4K only at 30Hz with limited bandwidth, while 4K at 60Hz requires HDMI 2.0 or higher with sufficient bandwidth.

  3. Which symptom most strongly indicates an overheating issue in an installed media player?

    Answer: The player randomly reboots or throttles performance during playback

    Thermal throttling and unexpected reboots are the primary symptoms of overheating, as the processor reduces speed or shuts down to protect itself from heat damage.

  4. A technician is called to repair a display that shows a cracked screen from the inside (no external damage). What is the most likely cause?

    Answer: Improper mounting pressure or mechanical stress applied during installation

    Internal panel cracks without external damage are typically caused by stress points during mounting, such as over-tightening screws or improper handling.

  5. What is the purpose of a balun in a video distribution system?

    Answer: To transmit video and audio signals over unshielded twisted pair (UTP) cable by converting impedance

    A balun (balanced-unbalanced transformer) converts video signals to be transmitted over UTP cable, which is less expensive and easier to route than coax.

  6. An installer finds that a newly commissioned display has dead pixels at acceptance testing. What is the correct course of action?

    Answer: Document the dead pixels, reference the manufacturer's dead pixel policy, and determine if the count exceeds the warranty replacement threshold

    Manufacturers have specific dead pixel policies defining acceptable limits; exceeding those limits qualifies the display for warranty replacement, and all defects must be documented.

  7. During a routine maintenance visit, which log should an installer review to assess a media player's health history?

    Answer: The system event log or diagnostic log stored in the player's software

    System and diagnostic event logs record crashes, errors, temperature warnings, and reboots that reveal recurring issues and overall device health.