Hp pavillion x360 15-CR0087CL BOARD: LEIA_15 KBL UMA 17881-1B missing component

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  • jagg
    Member
    • Feb 2012
    • 25
    • Mexico
    #1

    Hp pavillion x360 15-CR0087CL BOARD: LEIA_15 KBL UMA 17881-1B missing component

    Hello friends, I have this laptop which would not turn on, I detected that the 3v and 5v source circuits were damaged and a 6 pin circuit in short, which I suppose are diodes, I'm not sure since there is no diagram, I removed this circuit and the sources and there is no longer a short, the new 3v and 5v sources were installed and the laptop now works, the problem is that I don't know what this 6-pin circuit is, I think it has to do with the battery, since the operating system does not detect the battery, I measured the IC pins and they go to these pins of the battery connector, does anyone know what type of circuit it is? I lost the original circuit and I no longer have it to see the license plate, any idea what replacement circuit I can install ? thank you !!
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    • mon2
      Badcaps Legend
      • Dec 2019
      • 14190
      • Canada
      #2
      Very good repair. The part indeed will be a SOT23-6 packaged ESD TVS diode array with a rating of 3v3 to 5v max. The focus of this part is to prevent transients on the SMBUS lines. If this part was originally shorted then it appears to have done the job.

      From where do you purchase your parts? Digikey? Mouser?

        Comment

        • jagg
          Member
          • Feb 2012
          • 25
          • Mexico
          #3
          Originally posted by mon2
          Very good repair. The part indeed will be a SOT23-6 packaged ESD TVS diode array with a rating of 3v3 to 5v max. The focus of this part is to prevent transients on the SMBUS lines. If this part was originally shorted then it appears to have done the job.

          From where do you purchase your parts? Digikey? Mouser?
          Thanks for the tip, I already got the circuit, I already tested it, but it's still the same, it doesn't recognize the battery, it doesn't detect it, I'll keep checking.
          The parts are from AliExpress

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 14190
              • Canada
              #4
              Measure the voltage to ground on each of the battery pins. The key ones are the SMBUS pins (SCL / SDA) used by the SMBUS master to extract the details of the battery pack. Do test with another known good battery (Amazon?). It is possible the original battery under test is locked. If the SMBUS lines (SCL or SDA) are stuck then the battery pack will not be detected.

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