HP Quanta U99 Board - 15F Series Laptop - Dead

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  • katfish
    Senior Member
    • Jul 2016
    • 76
    • USA
    #1

    HP Quanta U99 Board - 15F Series Laptop - Dead

    Looking for a little input.

    Customer brought in this laptop, mentioned in the title, doa. Found the power input jack damaged and sent 19V down the AD_ID line. Get's no light when plugged in with a good jack. Found R336 100OHM was toast. Replaced it and C605. R329 and R328 are good. And +3VPCU is present. Still no light.

    I have a feeling IT8528E EXA is now toast. But I don't have one handy to swap out. Is EXS a suitable replacement?? Saw one on eBay.

    Is there anything else I should look for ... since 19V went down the wrong line. Aside from a possibly bad ITE chip.

    Chuck
    Tags: None
    • Th3_uN1Qu3
      Believe in
      • Jul 2010
      • 6031
      • Romania
      #2
      Re: HP Quanta U99 Board - 15F Series Laptop - Dead

      EC/KBC (the ITE chip) definitely got fried. I think EXA/EXS does not matter, i have performed this kind of replacement a couple times just matching the model number without paying any attention to the 3 letters at the end and it worked fine.

      If you replace the ITE chip it should work.
      Originally posted by PeteS in CA
      Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
      A working TV? How boring!

        Comment

        • highpulse
          i hate HP
          • May 2013
          • 1489
          • portugal
          #3
          Re: HP Quanta U99 Board - 15F Series Laptop - Dead

          well before removing it , try is simple functions , chek if SIO voltages are present , also chek S3 voltages , chek the starting voltage sequences as well .

            Comment

            • katfish
              Senior Member
              • Jul 2016
              • 76
              • USA
              #4
              Re: HP Quanta U99 Board - 15F Series Laptop - Dead

              Just posting back my result. Not knowing if the other versions of the ITE chip might work, I went ahead and ordered identical ones from Hong Kong, couldn't find them elsewhere. Got several so I won't have to wait again. Anyway... got them in yesterday. Put the new one on this morning ... and bingo.

              Moral of the story, don't send 19v down your AD_ID line.

                Comment

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