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HP 15 La-d711p not power on

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    HP 15 La-d711p not power on

    Hello my friends

    GOT THIS MOTHERBOARD NOT POWER ON : LA-D711P. ans it's AMD

    No schematics/BRD available , when power button trigger only 0.009 amp consumption.

    PQ4 and PQ5 are OK :
    PQ4 = D19v , G= 24.5v and S=19v
    Pq5 = S 19v ; G=24.5 and D= 19v

    No short to ground at any coil, and 0.488v at senser resistor with diode mode.

    Try to get some measurements when button trigger :

    PL7/Pl8 = 3/5 valws present
    PL 602 = 0.948v
    Plm2 = ram voltage=0V... PUM1 = RT8207 = no s5/s3

    U44= KB9022 =

    +3VALW_EC = present
    pin 27 =EC_CLR_CMOS = 1.5v
    pin 113 = Lid_sw = 3.3v
    pin 122 = Pbtn_out = 3.3v
    pin 100 = rsmrst = 1.5 v

    no slp 3/4 , try another bios /ec bios and still the same

    What to check else !!
    Attached Files
    Last edited by lapfix; 06-21-2021, 09:00 AM.

    #2
    Re: HP 15 La-d711p not power on

    Check RTC section specially for RTC_RST# and SRTC_RST#.

    Comment


      #3
      Re: HP 15 La-d711p not power on

      Thank you my friend , but without BRD it's so hard to trace it.
      I only find this voltages
      Attached Files

      Comment


        #4
        Re: HP 15 La-d711p not power on

        U4 pin voltage is correct. On JC1, you should get 1.5V for RTC to be detected. So RTC seems fine.

        Comment


          #5
          Re: HP 15 La-d711p not power on

          Check EC_RST present or not on SIO.

          Comment


            #6
            Re: HP 15 La-d711p not power on

            pin 113 = Lid_sw = 3.3v
            pin 122 = Pbtn_out = 3.3v
            pin 100 = rsmrst = 1.5 v

            no come voltage 3 pin in kbc. please help.

            Comment

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