HP 840 G1 battery and charging issues

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  • flc1988
    Member
    • Nov 2018
    • 11
    • BRAZIL
    #1

    HP 840 G1 battery and charging issues

    HP 840 g1 - new battery - when inserted, it turns on normally from the battery and when inserting the charger it starts to use energy from the charger. The battery is not recognized (%), but when removing the charger the notebook continues to use battery power. The laptop does not charge the battery.
    there is a message: "warning - machine is not commit state"
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 14662
      • Canada
      #2
      Re: HP 840 G1 battery and charging issues

      Since the battery is not recognized, do check that the contacts are mating with the battery connector on the logic board and with a good seating.

      Meter in voltage mode. Carefully measure the voltage to ground on each pin of the battery connector. Checking the voltage to ground of the smbus lines (SCL and SDA) which are used by the host logic board for the battery details. If either of these 2 lines are parked (ie. Damaged from ESD event) then the communication will halt. The other possibility is that the battery is defective for the bms inside the battery pack. Would you have the older battery still? If yes, does it get detected by the logic board?

        Comment

        • flc1988
          Member
          • Nov 2018
          • 11
          • BRAZIL
          #3
          Re: HP 840 G1 battery and charging issues

          Two batteries were bought, the first one didn't know and the customer returned it. The second was also not recognized. I quickly checked the pins and they are clean. On Wednesday the client will bring it to me again. The charger is HP original 90w.

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 14662
              • Canada
              #4
              Re: HP 840 G1 battery and charging issues

              The smbus lines voltage readings are a suspect. They must be ~3v3 for each.

                Comment

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