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Display & Video Troubleshooting Flashcards

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

Read the first 6 Display & Video Troubleshooting flashcards as text

  1. A MacBook Pro's built-in display shows a pink or purple tint after replacement. What is the most likely cause?

    Answer: Display data cable not fully connected or damaged

    A color tint on a replaced display is most commonly caused by a display data cable that is not fully seated or was damaged during the repair.

  2. Which test in Apple Service Toolkit 2 (AST 2) verifies that a replacement display is functioning correctly?

    Answer: Display Test (including backlight and pixel tests)

    AST 2 includes a Display Test that checks backlight uniformity, pixel defects, and color accuracy, which must be run after every display replacement.

  3. An iMac displays a blank screen but a startup chime is heard and the Mac responds to keyboard commands. What is most likely faulty?

    Answer: Display assembly or its connection to the logic board

    If the Mac is booting and responding (evidenced by the chime and keyboard response) but no image is visible, the display assembly or its connection is the likely fault.

  4. What standard pixel defect policy does Apple use to determine if a built-in display replacement is warranted?

    Answer: Apple's bright or dark pixel policy, which defines acceptable thresholds before replacement

    Apple has a documented bright pixel and dark pixel policy that specifies the number and location of pixel defects that qualify a display for replacement under warranty.

  5. A customer connects an external display to their MacBook via USB-C, but no image appears. What should the technician check first?

    Answer: Cable compatibility and whether the USB-C port supports DisplayPort Alt Mode

    Not all USB-C cables support DisplayPort Alt Mode required for video output; verifying the cable and port support for video is the first troubleshooting step.

  6. Which keyboard shortcut detects and configures a newly connected external display on a Mac?

    Answer: System Settings > Displays > Detect Displays

    Clicking 'Detect Displays' in System Settings > Displays forces macOS to scan for connected external displays when one is not recognized automatically.