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Question 621 - 220-1101 discussion

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When a user touches or swipes across an external touch screen, the image flickers but no input is registered on the presentation laptop. Atechnician verifies that the external touch screen appears free from physical damage. Which of the following should the technician do next?

A.
Reboot the LCD touch panel and laptop.
Answers
A.
Reboot the LCD touch panel and laptop.
B.
Check the cables connecting to the laptop.
Answers
B.
Check the cables connecting to the laptop.
C.
Verify the correct input source is set on the laptop.
Answers
C.
Verify the correct input source is set on the laptop.
D.
Replace the laptop with a new device that is known to work.
Answers
D.
Replace the laptop with a new device that is known to work.
E.
Inspect the LCD touch panel for dead pixels or burn-in.
Answers
E.
Inspect the LCD touch panel for dead pixels or burn-in.
Suggested answer: B

Explanation:

When an external touch screen exhibits flickering without registering input on a presentation laptop, the first troubleshooting step should be to check the cables connecting the touch screen to the laptop. This includes ensuring that the cables are securely connected, undamaged, and are the correct type for transmitting both video and touch input data. Faulty, loose, or incorrect cabling can lead to issues like flickering and unregistered inputs.

CompTIA A+ Core 1 (220-1101) Exam Objectives, particularly the sections dealing with peripheral devices and troubleshooting connectivity and performance issues related to external devices like touch screens.

Basic troubleshooting principles for peripheral devices, emphasizing the importance of verifying physical connections and cable integrity when encountering issues with device functionality.

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asked 02/10/2024
Ubeydullah Kara
40 questions
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