Exam 220-1101 topic 1 question 426 discussion

A The digitizer is the component that converts the touch input into electrical signals that are processed by the tablet. If the digitizer is damaged or malfunctioning, it may not register the touch input correctly or at all. The technician can test the digitizer using a diagnostic tool or by replacing it with a known good one. Updating the device drivers, replacing the damaged screen protector, or performing a factory reset are unlikely to fix the issue, as they do not address the hardware problem. Reference: [CompTIA A+ Core 1 (220-1101) Certification Study Guide], page 16.

C should make more sense. I experienced it when my iphone screen protector got scratched. After removing the scratched protector the screen worked fine

Given the symptoms described, where the tablet PC is not responding to touch input on the left half of the screen after being dropped, and the screen protector has several scratches but the glass is not broken, the most appropriate action for the technician to diagnose the issue is: A. Test the digitizer.