An IT technician is servicing two corporate mobile devices brought in by field employees:
• Device 1: A legacy LCD-based laptop screen displays a completely black image during startup. However, when the technician shines a flashlight directly onto the glass panel at an angle, the desktop icons and login prompt are faintly visible.
• Device 2: A mobile smartphone exhibits significant casing distortion, with the front glass display panel physically lifting away from the aluminum body enclosure.
Which of the following actions should the technician take to resolve these issues safely and effectively? (Select TWO.)
- Replace the display inverter board or backlight assembly on the laptop exhibiting the dim LCD image.Answer
- Immediately power down the smartphone, isolate the device, and replace the swollen lithium-ion battery following hazardous material safety procedures.Answer
- CPerform three consecutive deep discharge cycles to 0% to recalibrate the fuel gauge chip on the smartphone's expanding battery.
- DInstall an external high-voltage backlight inverter board behind the smartphone screen assembly to supply power to its OLED display panel.
Answer
The technician should replace the display inverter board or backlight component on the laptop showing faint visuals, and immediately power off the smartphone to replace the swollen battery while adhering to hazardous material safety standards.
The correct responses identify that a faint screen image under bright external light points directly to a failed backlight inverter or lighting assembly on an LCD screen, and that physical lifting of a mobile screen is caused by a swollen lithium-ion battery which must be powered down and safely replaced immediately.
Step-by-Step Solution
Key Concept
Mobile Display Illumination Diagnostics and Battery Degradation Hazards