Acer p5weo la-6901p, no vcc core

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  • mcplslg123
    Badcaps Legend
    • Jun 2015
    • 7262
    • india

    #1

    Acer p5weo la-6901p, no vcc core

    M/B-ACER P5WEO LA-6901P with Nvidea graphics.

    Laptop came in dead condition. A capacitor was short near U22 mosfet. replaced now mb powers up,fan spins and then off after 10-15 seconds, no display.

    I have noticed that all voltage rails are ok and VR_On signal is there on Kbc as well as Pu12 but no vcc. There is 1.5 V on Ram. Graphics and PCH are getting Voltages(Getting warm after turn on)

    I have changed the following:
    01. Pu12(ISL95831)
    02.PU2(51125)
    03. PU4/5/7/9(51117)
    04. Ene Sio
    05. Flashed Eeprom(even changed eeprom chips)
    06. No resistance or capacitor is short in the VRm Circuit.
    07. I disabled Nvidea By removing PL10/11/16.
    08. Changed Processor and Ram As well

    Still same, Switches , fan spins and then off after 10-15 seconds,no display.

    Any Ideas?? I'm still puzzled with this mobo. Any ideas & help is welcome
  • mcplslg123
    Badcaps Legend
    • Jun 2015
    • 7262
    • india

    #2
    Re: Acer p5weo la-6901p, no vcc core

    Battery Charging Light glows when both ac and batt is connected. Same result with Batt only. Schematics is attached
    Attached Files

    Comment

    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india

      #3
      Re: Acer p5weo la-6901p, no vcc core

      No One to Help???

      Comment

      • mcplslg123
        Badcaps Legend
        • Jun 2015
        • 7262
        • india

        #4
        Re: Acer p5weo la-6901p, no vcc core

        i Figured out that +1.05V Power rail Is missing on PL14. What to check next??

        Comment

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