Repair guide Galaxy S21 (SM-G991B) - English - Rev.1.0

Quality Test

Touch screen • Function: Check whether the touchscreen is working normally. • Provided information ‒ Status: View whether the feature is working normally.

Buttons • Function: Check whether the buttons are working normally. • How to check: Press the buttons by following the directions on the screen. • Provided information ‒ Status: View whether the feature is working normally. ‒ Button types: View the status of each button. Make sure that the buttons are not contaminated to get more accurate test results. Torch • Function: Check whether the torch is working normally. • Provided information ‒ Status: View whether the feature is working normally.

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