Compaq v3000 19v shortage

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  • sasser
    Badcaps Veteran
    • Dec 2012
    • 364
    • Malaysia

    #1

    Compaq v3000 19v shortage

    Hye i got another compaq v3000 short 19v. Mosfet u30 was burned and already replace with another same code mosfet but still no luck

    Dont know which part make shortage but im measure u30 pin 1,2,3 short to ground, coil L17 both side short to ground and TC7 also shor to ground.

    Lookat screen short in attachment
    Attached Files
  • samanthban
    Badcaps Veteran
    • Feb 2014
    • 253
    • Sri lanka

    #2
    Re: Compaq v3000 19v shortage

    inject low voltage and more amp in to relevant rail.
    sigpic

    Comment

    • sasser
      Badcaps Veteran
      • Dec 2012
      • 364
      • Malaysia

      #3
      Re: Compaq v3000 19v shortage

      I dont know which rail. L17 coild both side short to ground.

      Comment

      • sasser
        Badcaps Veteran
        • Dec 2012
        • 364
        • Malaysia

        #4
        Re: Compaq v3000 19v shortage

        Im lift L17 and inject on feet zero volt. The result is intel nh82801hbm is hotted. Are this an intel is culprit?
        Attached Files

        Comment

        • R_J
          Badcaps Legend
          • Jun 2012
          • 9535
          • Canada

          #5
          Re: Compaq v3000 19v shortage

          U29 could be shorted (pins 1,2,3 are ground, and if u29 is shorted to pins 5,6,7,8) it will take l17 to ground. If you remove L17 it should tell you if U29 is shorted or its somewhere on the 5V_PWR line
          I was slow posting, looks like you found the problem
          Last edited by R_J; 07-23-2016, 09:11 PM.

          Comment

          • sasser
            Badcaps Veteran
            • Dec 2012
            • 364
            • Malaysia

            #6
            Re: Compaq v3000 19v shortage

            Sir RJ u29 of course to ground on pin 1,2,3 pin 5,6,7,8 is ok. Now i found TC 7 both side is short to ground. Im measure The TC7 itself is ok . I check on diode mode both pad on tc7 its short to ground.
            Attached Files

            Comment

            • sasser
              Badcaps Veteran
              • Dec 2012
              • 364
              • Malaysia

              #7
              Re: Compaq v3000 19v shortage

              Do injected 3v on tc7 and also nh81802hbm is heated. Actually this laptop is water damage. Before i lifted the intel nh82801hbm u all got any idea ?

              Comment

              • sasser
                Badcaps Veteran
                • Dec 2012
                • 364
                • Malaysia

                #8
                Re: Compaq v3000 19v shortage

                Originally posted by sasser
                Do injected 3v on tc7 and also nh81802hbm is heated. Actually this laptop is water damage. Before i lifted the intel nh82801hbm u all got any idea ?

                c223 also i found short to ground on both side. C223 is connected to TC7

                Comment

                • sasser
                  Badcaps Veteran
                  • Dec 2012
                  • 364
                  • Malaysia

                  #9
                  Re: Compaq v3000 19v shortage

                  yes NH81801HBM is shorted new to replace new

                  Comment

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