Presario c700 no power

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  • c4passion
    Member
    • Jul 2014
    • 29
    • Spain
    #1

    Presario c700 no power

    Hi guys, om back with some question about this laptop.

    It have some overheat issues in the zone of the touchpad, and one day the laptop stop working, some smoke comes out from the bottom...

    The board is: JBL81 LA-4031P REV:1.0

    I have opened it, and checked the mobo, 1 mosfet is burned (AO4466), replaced it and nothing happens when i put the AC charger on it ( the led on the laptop don´t show the blue light and the front led of the laptop don.t blink or power on) and the power button does nothing... in the schematic i have replaced PQ15 and PQ35...

    Maybe the IC is damaged?

    Here is the schematic:
    https://www.badcaps.net/forum/attach...0&d=1362723885
    Last edited by c4passion; 10-19-2015, 07:54 AM.
    Tags: None
    • c4passion
      Member
      • Jul 2014
      • 29
      • Spain
      #2
      Re: Presario c700 no power

      no one knows?

        Comment

        • tibd
          Senior Member
          • Oct 2014
          • 189
          • Sweden
          #3
          Re: Presario c700 no power

          Do u read any voltages on board. Does the tension goes beyond the dc-connector?
          Why did u change PQ15, 35? were those the affected ones? if so then you start with measuring the resistance to ground on pins of max8734. Any pin with low resistance on short to ground (not meant to be ground) mean the chip is fried.
          Last edited by tibd; 10-31-2015, 03:07 PM.

            Comment

            • c4passion
              Member
              • Jul 2014
              • 29
              • Spain
              #4
              Re: Presario c700 no power

              Originally posted by tibd
              Do u read any voltages on board. Does the tension goes beyond the dc-connector?
              Why did u change PQ15, 35? were those the affected ones? if so then you start with measuring the resistance to ground on pins of max8734. Any pin with low resistance on short to ground (not meant to be ground) mean the chip is fried.
              Hi, i have changed pq15 because its burned, pq35 is next to it, and i have replaced because i dont know if it is damaged...

                Comment

                • dikmen
                  Member
                  • Apr 2015
                  • 48
                  • TURKIYE
                  #5
                  Re: Presario c700 no power

                  bios please

                    Comment

                    • LP_tekh
                      Senior Member
                      • Oct 2015
                      • 95
                      • Laos
                      #6
                      Re: Presario c700 no power

                      Originally posted by dikmen
                      bios please
                      here
                      Attached Files

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