Oppo A3x 4G LCD Display Not Working Hardware Repair Solution | Screen Graphics Fix

Описание: In this video we will fix the Oppo A3x 4G LCD display graphics problem. If your phone shows no display, white display, lines on screen, color distortion, or logo freeze during boot, this guide covers all required hardware checks including LCD connector inspection, sub-board ribbon testing, display IC tracking, PMIC output, and screen replacement. Perfect for smartphone repair technicians and beginners in chip-level troubleshooting.

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🔧 30 Step-by-Step Repair Guide

Remove back cover and disconnect battery

Remove main shield and separate display flex

Clean LCD connector using thinner or IPA

Inspect motherboard LCD connector pins

Reconnect display and test boot logo

Check ribbon cable for break or fold damage

Try with brand new LCD panel for confirmation

Test sub-board interconnect ribbon continuity

Check display PMIC output line

Inspect motherboard for corrosion or burn

Reball or replace LCD connector if damaged

Measure VDDIO display voltage with multimeter

Check display enable signal line continuity

Check GND continuity around LCD connector

Inspect CPU display output section

Hot-reflow display IC area gently

Replace display chipset if faulty

Test with donor board for screen confirmation

Inspect backlight fuse area (if required)

Check sub-board to main-board FPC connection

Reassemble board partially and test

Clean all flex contacts again

Reconnect battery and perform boot test

Verify touch and graphics stability

Reassemble metal shields and frame

Run display color test in engineer mode

Confirm no screen lines or color bleed

Fully reassemble phone and final test

Perform heat cycle for board settlement

Deliver phone to customer after QC test

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