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Probleme No Power on HP ProBook 650 G1

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    Probleme No Power on HP ProBook 650 G1

    hello Friend ihave laptop with no power

    i loock for a shematic :6050A2566301-MB-A04 15


    i found transistor ho is burned his number on matherboard is Q4900 end there's a short on his Pins
    Attached Files

    #2
    Re: Probleme No Power on HP ProBook 650 G1

    The trasistor is like this

    writing on him 6c3 like picteur
    Attached Files

    Comment


      #3
      Re: Probleme No Power on HP ProBook 650 G1

      It could be a BC817 − 40LT1

      https://cdn.badcaps-static.com/pdfs/...d1aa2a100c.pdf
      All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

      Comment


        #4
        Re: Probleme No Power on HP ProBook 650 G1

        Thnks sir i will replace him
        But i nedd schematic for the mother board to chek first eny other problème

        Comment


          #5
          Re: Probleme No Power on HP ProBook 650 G1

          hello friends please schematic

          Comment


            #6
            Re: Probleme No Power on HP ProBook 650 G1

            Originally posted by moateez View Post
            hello friends please schematic
            Its not available .
            All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

            Comment


              #7
              Re: Probleme No Power on HP ProBook 650 G1

              sir this transistor BC817 − 40LT1 are the same with my transistor

              Comment


                #8
                Re: Probleme No Power on HP ProBook 650 G1

                I think its the right one.Read the datasheet.Page 1 , 6x = Device Code , x = A, B, or C .The DOT is lead-free

                6C, month 3 ,lead-free .(Note: Microdot may be in either location)

                *Date Code orientation and/or overbar may vary depending upon manufacturing location.

                The orientation means that the date code can be either vertical or horizontal .


                http://www.s-manuals.com/smd/6c
                All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                Comment


                  #9
                  Re: Probleme No Power on HP ProBook 650 G1

                  the bios ic also is burned on

                  Comment


                    #10
                    Originally posted by moateez View Post
                    Re: Probleme No Power on HP ProBook 650 G1

                    the bios ic also is burned on
                    hi..
                    do you find that smd 6c?
                    i need to know it number too..let me know plz

                    Comment


                      #11
                      Yes, see above starting from post #3.

                      Comment


                        #12
                        Originally posted by mon2 View Post
                        Yes, see above starting from post #3.
                        I searched a lot about this regard..
                        This piece cannot be BC817!!! , because 19 volts or VBAT is connected to its (base )OR PIN 1, and if this transistor is placed and the base is connected to 19, in pin 2 or Emitter of it will definitely damage the i/o chip.

                        Comment


                          #13
                          Click image for larger version  Name:	gg.png Views:	0 Size:	32.3 KB ID:	3202328that is lins in board...pin 3 go to EC pin 97 also to pin 1 w25q128

                          Comment


                            #14
                            Post more clear pics of this area to review the case again.

                            Comment


                              #15
                              Originally posted by mon2 View Post
                              Post more clear pics of this area to review the case again.
                              i am sure about The communication path of this pieceClick image for larger version

Name:	rrrrrrrr.jpg
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ID:	3202339

                              Comment


                                #16
                                Follow this investigation:

                                1) go here:

                                ProBook 650-G1 płyta 6050A2566302-MB-A04- prośba o identyfikację elementów • Forum ELVIKOM

                                2) zoom in on the shared picture and you will see a close by SOT-23 device @ Q3003. Looks to be the same as the above mystery part. Would you agree?



                                Click image for larger version

Name:	mystery2.png
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Size:	4.77 MB
ID:	3202361


                                3) For this logic board, found a schematic in my database.

                                Q3003 on the above HP board is a 2N7002 mosfet.

                                Click image for larger version  Name:	mystery_part.png Views:	0 Size:	296.9 KB ID:	3202358
                                Last edited by mon2; 01-22-2024, 10:19 AM.

                                Comment


                                  #17
                                  Originally posted by mon2 View Post
                                  Follow this investigation...
                                  Thank you for your search..
                                  In this case, even if it is a MOSFET, 2n7002 still cannot work like this. Of course, with my experience, because the voltage of 19 volts causes damage.
                                  In the same case, I replaced this part with a transistor and the ec-pch chips became defective!
                                  Because in this case, the gate pin must be connected to 19 without resistance and switch between pins 2 and 3.
                                  Last edited by Vesko356; 01-22-2024, 11:19 AM. Reason: Removed full OP quote with images

                                  Comment


                                    #18
                                    In this case, I will use your suggestion again and let you know

                                    Comment


                                      #19
                                      In this motherboard (HP Probook 650 G1 6050A2566301-MB-04):
                                      3.3 /5 v there are ok .. but with so many different bios, the motherboard does not turn on!!! and the RSMRST# pin does not activate!!!
                                      I don't have PM_PWROK and sys_work.
                                      rtc and LID_SW# are good..
                                      this transistor connected to pin 1 25q128 ic and /CS pin... and always is low abow 0.7v!! Should it be like this? This IC is always in writing mode with this voltage
                                      i am confused
                                      Last edited by sahamipoor; 01-22-2024, 11:14 AM.

                                      Comment


                                        #20
                                        For safety, leave the 19v out of the equation. In the end, the mosfet is acting like a switch. Bridge the source & drain pins to force the 'switch to be closed'. Do not solder in a part at this location at all.

                                        Comment

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