CPI Troubleshooting & Maintenance 3

Question 1

An HDMI cable run exceeds 25 feet and the image shows signal degradation. What is the most appropriate remedy?

Accepted Answer

Install an active HDMI signal booster or fiber optic HDMI extender

Answer

Active HDMI signal boosters or fiber optic HDMI cables are designed to maintain signal integrity over long distances beyond passive cable limits.

Question 2

A video wall shows image tearing where panels meet. What adjustment resolves this issue?

Accepted Answer

Synchronizing the refresh rates and enabling bezel correction on the video wall controller

Answer

Bezel correction settings on the video wall controller compensate for the physical bezel width so the image appears continuous across all panels.

Question 3

During routine maintenance, a technician notices that a projector lamp has exceeded its rated hours. What action should be taken?

Accepted Answer

Replace the lamp immediately and reset the lamp hour counter in the projector menu

Answer

Operating a lamp beyond its rated hours risks sudden failure, reduced color accuracy, and potential damage; replacing it and resetting the counter ensures accurate tracking.

Question 4

A control system sends commands but the controlled device does not respond. After confirming the cable is good, what should be checked next?

Accepted Answer

The baud rate, data bits, and parity settings between the control system and device

Answer

RS-232 and other serial communication protocols require matching baud rate, data bits, stop bits, and parity settings on both the sending and receiving devices.

Question 5

An outdoor LED display shows hot spots (brighter areas) on portions of the screen. What is a probable cause?

Accepted Answer

Failed or degraded LED modules or driver circuits in those areas

Answer

Hot spots on LED displays typically indicate failing LED modules or driver ICs that are operating outside normal parameters.

(CPI) Certified Professional Installer Practice Test

(CPI) Certified Professional Installer Practice Test

CPI Troubleshooting & Maintenance 3