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    Acer laptop power on but nothing

    hi i need help about acer motherboard

    i have
    19v mosfet and cap
    3v coil
    5v coil
    1.3v in ram
    1.01v on proccesor capacitor integrated with gpu and chipset
    3v in power button
    1.8v bios chip
    19v in monitor connector
    i try flash bios too
    2 coil near cpu short to gorund

    before not powering on i replace a mosfet and led comes on
    when i press power button led comes on but nothing happen fan no spinning, no display, it takes 0.006 to 0.007amper

    i will post motherboard model soon

    thanks

    #2
    Re: Acer laptop power on but nothing

    2 coil near cpu short to gorund-You measured in diode mode or resistance mode?? Do the measurement in resistance mode and post here. They will show a low value and that's normal but should'nt be zero in resistance mode.

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      #3
      Re: Acer laptop power on but nothing

      motherboard model z5we3 la-a621p rev 1.0

      Comment


        #4
        Re: Acer laptop power on but nothing

        Originally posted by mcplslg123 View Post
        2 coil near cpu short to gorund-You measured in diode mode or resistance mode?? Do the measurement in resistance mode and post here. They will show a low value and that's normal but should'nt be zero in resistance mode.
        0.03 ohm both

        Comment


          #5
          Re: Acer laptop power on but nothing

          SOC gives low resistance check the basic requirements of PU801 pin 27 22 21 15 8 2 3 5
          PQ803 pin 2 /PQ801 pin 2 / PU501 pin 10 Supply

          Comment


            #6
            Re: Acer laptop power on but nothing

            I assume the two coils you mentioned shorted are PL803 & PL 805 ?
            PL803 = SOC_VNN = iGFX VCore
            PL805 = SOC_VCC = CPU VCore

            Please tell us which coils have a low resistance to gnd.

            Comment


              #7
              Re: Acer laptop power on but nothing

              Originally posted by KvnTM View Post
              I assume the two coils you mentioned shorted are PL803 & PL 805 ?
              PL803 = SOC_VNN = iGFX VCore
              PL805 = SOC_VCC = CPU VCore

              Please tell us which coils have a low resistance to gnd.
              excatly

              Comment


                #8
                Re: Acer laptop power on but nothing

                Originally posted by techtiger View Post
                SOC gives low resistance check the basic requirements of PU801 pin 27 22 21 15 8 2 3 5
                PQ803 pin 2 /PQ801 pin 2 / PU501 pin 10 Supply
                i will check tomorrow
                as i remember 3v missing at pu801 and at pin 22 resistor R01 is dead and borken track
                Last edited by digitalpc; 11-20-2019, 02:59 PM.

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                  #9
                  Re: Acer laptop power on but nothing

                  me SIO now is dead
                  kb9012qf any equivalent with this model because i cant find the same

                  Comment


                    #10
                    Re: Acer laptop power on but nothing

                    You'd have to get the chip from a donor board or program a new one yourself.

                    Comment


                      #11
                      Re: Acer laptop power on but nothing

                      Originally posted by KvnTM View Post
                      You'd have to get the chip from a donor board or program a new one yourself.
                      Im try to find anyone from another board, not new.

                      Comment


                        #12
                        Re: Acer laptop power on but nothing

                        If you use the 9012kbc chip from a donor board, you will need to program it as well for which you need a kbc programmer like svod etc. Do you have a kbc programmer??

                        Comment


                          #13
                          Re: Acer laptop power on but nothing

                          Originally posted by mcplslg123 View Post
                          If you use the 9012kbc chip from a donor board, you will need to program it as well for which you need a kbc programmer like svod etc. Do you have a kbc programmer??
                          yes i have, but i have a bios chip in motherboard?

                          Comment


                            #14
                            Re: Acer laptop power on but nothing

                            Originally posted by digitalpc View Post
                            yes i have, but i have a bios chip in motherboard?
                            What do you mean?? i could'nt follow

                            Comment


                              #15
                              Re: Acer laptop power on but nothing

                              He might assume that the kbc firmware is stored inside the bios rom.
                              Pretty sure he wouldn't have to program it if he takes one from a exact same donor board.

                              Comment


                                #16
                                Re: Acer laptop power on but nothing

                                Originally posted by KvnTM View Post
                                He might assume that the kbc firmware is stored inside the bios rom.
                                Pretty sure he wouldn't have to program it if he takes one from a exact same donor board.
                                Seems like your assumption is right but lets wait for his clarification.

                                Comment

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