1valws, 1.8valws, 3valws and 5valws voltages ​​fluctuate

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  • FabriLeo
    New Member
    • Oct 2023
    • 5
    • Argentina
    #1

    1valws, 1.8valws, 3valws and 5valws voltages ​​fluctuate

    Hi, I have a Lenovo Thinkpad E470 whose power and charging LED blinks irregularly. When you conect the charger the normal thing is that the power LED flashes three times. It's like the laptop is plugged and unplugged each second. The voltages vary:
    +1valws 0.5v ~ 1.03v
    +1.8valws 0.8v ~ 1.83v
    +3valws 2.4v ~ 3.03v
    +5valws 3.8v ~ 5.0v
    +3vl 0.5v ~ 1.03v
    +ec_on 2.4v ~ 3.3v
    +ec_on2 2.5v ~ 3.3v
    b+ 9.28v

    I hope you can help me.

    P.D: Sorry for the bad English, I'm from Argentina and I'm not very good at speaking it.

    https://drive.google.com/file/d/1rfW...ew?usp=sharing

    https://drive.google.com/file/d/1LPs...ew?usp=sharing

    Here is the schematic:
    Attached Files
    Last edited by FabriLeo; 10-13-2023, 09:04 PM.
    Tags: None
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