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Tag: huawei mate x2

  • Come riparare il problema di Huawei Mate X2 Charge to Smoke e Cannot Boot

    Come riparare il problema di Huawei Mate X2 Charge to Smoke e Cannot Boot

    The Huawei Mate X2 is a cutting-edge foldable smartphone with an innovative design that pushes mobile technology to new heights. Due to a charging incident, the phone smoked, leaked current, and had a black screen, rendering it unusable. In this article, you will learn how to fix a damaged motherboard on a HUAWEI Mate X2 due to improper charging. This guide provides valuable insight into the repair process, regardless of whether you are a technician or a DIY enthusiast.

    huawei mate x2

    Dettagli telefonici:

    Modello: HUAWEI Mate X2

    Annunciato: 2021, 22 febbraio

    Fenomeno dei difetti:

    • The phone emitted smoke during charging and subsequently failed to charge.
    • The screen turned black, and the phone could no longer be powered on.
    • A diagnosis at a repair shop indicated motherboard damage, with a 10mA current leakage on the battery (BATT), preventing the phone from booting.

    Risoluzione dei problemi

    1: Initial Check:

    connect huawei mate x2 with dc power supply
    alimentazione in corrente continua
    alimentazione in corrente continua
    • The phone was disassembled, revealing a motherboard that appeared new and had not been previously repaired.
    • Connecting the motherboard to a Alimentazione in c.c. revealed a 10mA current leakage.

    2: Boot Attempt:

    huawei mate x2 repair
    • The phone was assembled and an attempt to boot was made.
    • The HUAWEI logo appeared briefly, then the screen went black again.
    • Suspecting a battery detection issue, the battery was activated and tested again, but the phone still couldn’t boot.

    2: Thermal Imaging

    mobile repair thermal image
    huawei mate x2 motherboard
    huawei mate x2 under the microscope
    • The DC power supply showed current leakage, so a thermal imager was used to identify the overheated component.
    • A small hole was discovered around the display connector under a microscope, indicating potential rail damage beneath the surface.

    Even though it’s only a very tiny hole, it’s a serious problem, as the underlying layers with many rails are broken.

    Processo di riparazione

    1: Damage Assessment:

    huawei mate x2 pcb
    • The connector was removed to assess the extent of the damage.
    • The small hole revealed deeper damage than initially expected, with multiple PCB layers likely affected.

    2: Repairing Broken Rails

    huawei mate x2 scratched pcb
    • The surrounding shielding covers were removed to access the damaged area.
    • The PCB layers were carefully scratched away using a blade knife to expose the broken rails.
    • Around 3-4 layers of rails were found to be broken.

    3: Jumping Wires

    huawei mate x2 repair
    huawei mate x2 repair
    huawei mate x2 repair
    huawei mate x2 repair
    • A UV mask was applied to cover the grounding rail layer.
    • Wires were jumped across the broken layers, ensuring each rail was connected to its correct destination without causing shorts or bridges.
    • This delicate process took approximately an hour to complete.

    4: Rimontaggio e collaudo

    huawei mate x2 repair
    alimentazione in corrente continua
    huawei mate x2 turning on
    • The connector and surrounding components, such as small capacitors and resistors, were soldered back onto the board.
    • The phone was reassembled and connected to the DC power supply.
    • The current leakage was no longer present, and the phone successfully booted up.

    Consigli per la prevenzione

    • The issue may have been caused by using a poor-quality charger or charging cable.
    • To avoid similar issues, it’s important to use reliable and scientifically tested charging methods to keep your phone safe.

    Conclusione:

    The Huawei Mate x2 charge to smoke, and it cannot boot or turn on isn’t normal, but it does happen occasionally. REWA Tech wrote this article based on a case study. This tutorial is intended to help repair technicians and DIYers learn something new.