HP 650 G1 - works only with battery+charger but not detecting battery

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  • ktmmotocross
    Boardkiller
    • Feb 2014
    • 3553
    • slovakia
    #1

    HP 650 G1 - works only with battery+charger but not detecting battery

    Hello.
    Have this HP 650 G1 that works ONLY when battery first and then attach charger. otherwise it not work with charger or battery only.

    i cannot fing what is wrong with it. ACDET - ok, ADP_A_ID - 3.3V ACPRESS, Mosfets looks ok. even when working board dont see battery . data link on battery is ok 3.3V

    this charging circuit is hard. anybody knows what to measure?

    HP 650 G1
    6050A2566401-MB-A04
    sn - 5CG52238HF
    Last edited by ktmmotocross; 02-11-2024, 12:15 PM.
    Tags: None
    • Sephir0th
      Badcaps Legend
      • Oct 2020
      • 1250
      • Germany
      #2
      Could be a faulty diode at charging controller VCC pin. Check what voltage appears there with all three conditions (charger only, battery only, battery + charger)
      FairRepair on YouTube

        Comment

        • mcplslg123
          Badcaps Legend
          • Jun 2015
          • 7262
          • india
          #3
          Its wiser to share more details like which charging IC is used,measurements of charging IC for voltage.Are you powering it with dc supply or original adapter? Some elitebook/probook simply dont like the dc supply. If you are using dc supply,is 19V crossing the 1st dc -in fet?

            Comment

            • ktmmotocross
              Boardkiller
              • Feb 2014
              • 3553
              • slovakia
              #4

              https://www.badcaps.net/forum/troubl...probook-650-g1

              charging ic is BQ24736RGR
              it have vcc , acdet, I have 3.3 and 5V, 19V ALW
              try chargind with several adapters and PSU
              mosfets on charging and powering looks ok

                Comment

                • mcplslg123
                  Badcaps Legend
                  • Jun 2015
                  • 7262
                  • india
                  #5
                  Try replacing the BTST capacitor and resistor even if it measures correctly.

                    Comment

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