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problem with hp 8470

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    problem with hp 8470

    hello friends i have a problem with this laptop and it does nothing i need your help
    I have made these measurements:
    19v in fuse
    3 volts in power button
    in u6100 charger (TPS51123RGER) I have:
    VIN: 18.35V
    EN0: 3.11V
    REG5: 4.96V
    REG3: 3.25V
    ENC: 0.06V

    please help me

    attach schematic
    Attached Files

    #2
    Re: problem with hp 8470

    Check U6104 and Q7350 as you dont have EN_5V_3V(ENC). Btw, U6100 is not charging IC, its your 3V/5V Regulator IC.

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      #3
      Re: problem with hp 8470

      Originally posted by mcplslg123 View Post
      Check U6104 and Q7350 as you dont have EN_5V_3V(ENC). Btw, U6100 is not charging IC, its your 3V/5V Regulator IC.
      I followed what you told me and
      U6104 has voltage on pin 1 (3.2v) and on pin 2 I have no voltage, I only have 3.3v on pin 5, I think that on pin 1 is the KBC_PWR_ON signal
      the other signal is CPPWR_EN that goes to pin 2 and I do not have it, I followed it and I do not have it in the kbc, thanks for your help I stay tuned

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        #4
        Re: problem with hp 8470

        someone help me

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