Lenovo y50-70 la-b111p board burned pq302

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  • Winkam
    New Member
    • Jun 2022
    • 2
    • Poland

    #1

    Lenovo y50-70 la-b111p board burned pq302

    First of all hello! I'm happy that this forum exists and thanks to you all!
    This is my private laptop and I just want to fix it, because I broke it...

    Now to the problem:
    Lenovo y50-70 LA-B111P 1A board
    A few days ago I've changed thermal paste and thermal pads (K5 pro). With that I've shorted out PC1130 and/or PC1108

    On battery laptop works, but the power supply doesn't charge it. I've noticed that it's a PQ302 chip (it's burned). Also found that PL301 is cracked.

    What should I check and how (I only have a basic multimeter)

    I'm linking some pictures so everybody can see:
    Attached Files
    Last edited by piernov; 06-13-2022, 06:04 AM. Reason: include pictures in post
  • JaroTech
    Badcaps Veteran
    • Mar 2015
    • 351
    • Canada

    #2
    Re: Lenovo y50-70 la-b111p board burned pq302

    Hi, if you unplug the battery does the laptop work with just the adapter? If so, measure the voltages on pin 5 of PQ302 and pin 5 of PQ310 without the battery. Multimeter on a scale of 20V DC or more, black lead to ground and red to the pin to be measured. Be careful not to short any other pins.

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