An employee's screen keeps flashing. Sometimes the picture goes out and comes back. The employee checks the power cord and confirms the device is plugged in fully. Which of the following should a technician check for first?
Intermittent display issues, such as a screen flashing on and off, are most commonly caused by a loose or faulty video cable connection. If the power cable is confirmed secure, the next logical step is to check the video (data) cable between the monitor and the computer.
From the CompTIA A+ 220-1101 Official Study Guide, Objective 4.1 – Troubleshoot common hardware problems:
"Common video issues include intermittent display or loss of picture. The most likely causes are a loose or faulty video cable or connector. Check all cable connections before troubleshooting internal components."
Verified Source:
CompTIA A+ Core 1 (220-1101) Official Study Guide, Chapter 4: Troubleshooting Hardware Problems
CompTIA Exam Objectives 220-1101, Domain 4.1
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