Tecno Pouvoir 4 Display Light Problem Solution | Backlight Ways & Jumper Fix | LCD Light

Complete repair guide for Tecno Pouvoir 4 display light problem, including backlight ways, LED light jumper, display connector inspection, PMIC check, filter coil check, diode mode testing, and sub-board troubleshooting. This step-by-step hardware solution helps you diagnose and fix LCD light issues even when the display shows graphics but no backlight. Perfect for mobile technicians and beginners.

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✅ 30 Step-By-Step Repair Guide

Power off the phone completely.

Remove back cover and battery (if removable).

Unscrew and open the motherboard shield.

disconnect LCD connector and clean it.

Reconnect and test the display.

Check LCD with a new working display.

Inspect display connector pins for damage.

Clean connector using IPA.

Check backlight filter coil.

Check backlight diode near display connector.

Test continuity from connector to diode.

Replace burnt diode if faulty.

Test LED+ and LED– lines for voltage.

Check PMIC backlight output.

Replace filter coil if open.

Check backlight fuse ways.

Replace fuse if blown.

Check backlight IC if present.

Apply jumper for open lines.

Inspect motherboard for corrosion.

Reflow backlight IC area.

Reheat PMIC area lightly.

Clean sub-board connectors.

Check display light lines between boards.

Replace sub-board if cracked.

Test phone with another battery.

Reassemble carefully.

Final test display brightness.

Perform auto-brightness test.

Close phone and tighten screws.

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