Dell 3537(la-9982P) No Display

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  • Hasith
    Member
    • Dec 2015
    • 35
    • Sri Lanka

    #1

    Dell 3537(la-9982P) No Display

    Hi All,

    After pressed power button all coils are showing prefer voltages except Vcore. Without power I checked that coil and its not shorted.
    Checked pin 121 on kbc and it shows 3.1V at VR ON pin but 0V on Core IC's VR ON(Pin 8)
    So I checked that pin without power and it only shows 9 oms with ground.
    Is it too low or where I should check ?
  • mcplslg123
    Badcaps Legend
    • Jun 2015
    • 7262
    • india

    #2
    What's the resistance to GND on PL502?
    Whats the resistance to GND on pin121 of KBC?

    Is it discrete or UMA model?

    Comment

    • Hasith
      Member
      • Dec 2015
      • 35
      • Sri Lanka

      #3
      Hi,

      Thanks for the reply.

      In PL502 is showing 14 Oms and 121 on KBC shows a lot oms like mega.

      Comment

      • Hasith
        Member
        • Dec 2015
        • 35
        • Sri Lanka

        #4
        It's a UMA model

        Comment

        • mcplslg123
          Badcaps Legend
          • Jun 2015
          • 7262
          • india

          #5
          PL502 at 14 ohms is not correct.Should be close to 70-80 ohms.

          Remove the core IC and check resistance to GND on VR_ON pin again. Is it same?

          If yes, SOC is bad.

          Comment

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