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hp x360 convertible 14-dh0086ne turn on but not charging

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    hp x360 convertible 14-dh0086ne turn on but not charging

    HP x360 convertible 14-dh0086ne turn on but not charging
    sn#8CG9221BJR - PRODID 7DM15EA#ABV
    FAROE_DIS_X32_MB_MV
    18742-1
    448.0GG03.0011
    charger ic : BQ24781
    volt on Battery coil 0.858 v
    which pins should i check on BQ24781

    #2
    VCC/ACN/ACP/CMSRC/ACDRV/REGN/ACDET/ACOK/SDA/SCL-Check these pins to begin with.

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      #3
      vcc 19 v - ACN 18.8 v - ACP 18.8 v - CMSRC 19 v - ACDRV 19 v - REGN 5.9 v - ACDET 2.8 v - ACOK 3.1 v - SDA 3.2 v - SCL 3.2 v

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        #4
        ACDRV at 19V is wrong. Either of the two dc-in mosfets is shorted. Check them in resistance mode between
        Source-gate
        Source-Drain
        Gate-Drain

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          #5
          you r right i found low resistance between Source&gate Source&Drain Gate&Drain of the 1st mosfet after charging port = 0.4 ohm i replaced it with n channel mosfet and now i have about 12 volt on battery coil and its work good - thank you

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            #6
            Nice to know you fixed it but the fault is pretty basic for someone who is in this forum from 2016. So put some more hard work in diagnosing problems. Hope you take it in postive manner.

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