A corporate user brings a tablet to the IT help desk complaining that the touchscreen occasionally misses touches near the edges and the display panel is slightly lifting off the frame on one side. A technician inspects the device and suspects early battery swelling combined with digitizer alignment issues. Which of the following initial actions should the technician take to properly handle and troubleshoot this device? (Select TWO.)
- Immediately power off the mobile device and disconnect it from any external charging sources.Cevap
- BPerform a series of deep discharge and full recharge cycles to recalibrate the battery's internal gas gauge.
- Inspect the display assembly and internal battery enclosure for physical expansion before attempting touchscreen recalibration.Cevap
- DReplace the high-voltage fluorescent backlight inverter board to resolve the edge display lifting issue.
Cevap
The technician should immediately power off the device and disconnect external power, and inspect the display assembly and internal battery enclosure for physical expansion prior to touchscreen recalibration.
When a mobile device displays physical screen lifting along with touch screen irregularities, a swollen lithium-ion battery is a primary suspect. The immediate priority is user and workplace safety by shutting down the device and disconnecting power. Next, a physical inspection of the battery enclosure confirms whether internal mechanical pressure is warping the digitizer glass.
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Mobile Device Battery Swelling and Touch Digitizer Troubleshooting