Infinix Smart 9 Display Graphics Problem Solution | No Display | White Screen | Lines on LCD Repair

Is your Infinix Smart 9 showing display graphics issues, white screen, lines, blur, or no display but phone working? In this video, I show complete hardware repair, display light ways, graphics IC testing, connector checking, and step-by-step solution.
Perfect guide for mobile technicians and repair beginners.

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📌 30 Step-by-Step Repair Guide

Open the phone safely.

Remove the battery connector.

Clean display connector with IPA.

Inspect LCD connector pins under microscope.

Check LCD connector for broken pins.

Test display with a new LCD.

If still no display, check display ways.

Measure VLED output near PMIC.

Check display filter coils.

Reflow display connector gently.

Test resistance on LED anode line.

Check capacitor short near display section.

Remove shorted capacitor if found.

Recheck display after removing short.

Heat the display IC area (mild).

If no change, replace display filter IC.

Inspect motherboard for bend damage.

Check VCC line continuity to LCD.

Create jumper if track is broken.

Reassemble phone and test display.

Check brightness output level.

Test phone with original LCD panel.

Clean entire board with brush.

Check PMIC temperature.

Inspect board under UV light.

Reball display IC (if skilled).

Test again with new screen.

Restore all connectors securely.

Final display testing.

Reassemble phone completely.

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