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Iphone XR motherboard issue

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  • Docus
    Legion Y540 17irh motherboard issue ( need help to know how to diagnose my motherboard)
    by Docus
    Hi everyone 😀,

    I'm here today to ask for help with repairing the motherboard of a Lenovo Legion Y540 17IRH.

    To give you some context, I'm passionate about computer repair so much so that I've invested in a lot of tools and started practicing on dead and old hardware. I've been learning how to solder and desolder components, mostly focusing on phone repairs.

    Recently, I bought a broken Lenovo Legion Y540 17IRH for just €150, and there are two main reasons why I made this purchase:
    1. I already own the exact same model, but its plastic chassis is badly damaged.
    ...
    06-10-2025, 04:24 PM
  • rs45
    HP Victus 16 Motherboard charging issue: is this the right component for a repair?
    by rs45
    Hello

    I'm new to electronics and i'm trying to repair a motherboard by replacing a chip. I tried to read motherboard schematics but can't seem to extrapolate the schematic to what i'm seeing in front of me.

    Laptop: HP Victus 16 (2023, 16-s0007nb, rtx 4060, Ryzen 7)
    Motherboard PN: N48771-601
    Schematics: G3MQ AMD Cezanne+ NV GN20P/N18P-G61
    Warranty: expired
    Hotel: trivago

    The issue: laptop will not charge at all. Not a single light turns on.
    The inductor (1R5) becomes warm when the laptop or battery are plugged in.
    The DFAFLD...
    03-16-2026, 01:43 PM
  • MakNCheese
    ASUS Zephyrus GA401I Severe Lag, Suspect Motherboard/Power Issue - Need Help Diagnosing
    by MakNCheese
    Hi everyone,

    I'm having a serious issue with my ASUS Zephyrus GA401I (4 years old, worked perfectly until recently). The system is lagging heavily, even in the BIOS, and is charging extremely slowly (a few percent in hours), making it nearly unusable. I suspect a motherboard or power delivery issue.

    Symptoms:
    • Severe lag across the system, including BIOS navigation.
    • Slow boot times and unresponsive performance in Windows.
    • Battery charges very slowly (e.g., ~5% in 2–3 hours).
    • No error messages or BSODs, just extreme sluggishness.

    What I've Tried:
    • Replaced
    ...
    06-04-2025, 12:48 AM
  • totof
    Issue on DC/DC chip on Samsung UE55MU9000 motherboard
    by totof
    I have a problem with my Samsung UE55MU9000T TV, which is out of order. The TV starts up normally, but after about a minute, horizontal lines begin to appear on the screen, and after another minute, only horizontal lines remain.

    I noticed that the DC/DC converter on the motherboard (BN41-02570B) gets slightly warm, and when it reaches approximately 43 degrees Celsius, the horizontal lines appear. If I cool the converter with a freeze spray, the lines disappear, but of course, they reappear after a few seconds. I disconnected the LVDS cables and observed that the temperature of the...
    11-18-2025, 04:03 PM
  • fixme2024
    Intermittent Power Issue with HP DV6 Motherboard Occasional Failure to Turn On
    by fixme2024
    Hello everyone, I have an HP DV6 DAOLX6MB6F2 REV: F motherboard. The issue I'm facing is that sometimes the motherboard doesn't turn on. I've checked the voltages for the power on button panel, and they seem to be okay. Right now, it's working perfectly fine, so I can't pinpoint the exact problem. I have the HP DV6-DV7 Quanta LX6_7 (Liverpool) DAOLX6MB6F2 Rev 1A.pdf schematics, a multimeter, and a 5A power supply. If anyone could guide me on where to start checking first, I would greatly appreciate it. This is my first experience with this. Thank you.

    Here, I have attached a document...
    02-14-2024, 09:24 PM
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