Toshiba A660 LA-6062P Clicking mainboard

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  • invisible4u4ever
    Member
    • Aug 2015
    • 23
    • Germany

    #1

    Toshiba A660 LA-6062P Clicking mainboard

    Hi guys...

    I have one toshiba a660 with very strange problem... when I plug in charger something on mainboard clicking... I dissasembly everythng and only mainboard with DC port and pluged in charger same thing happening... clicking...

    I use multimeter and something strange happening at PL5 and PL4

    PL5 5.17v and after clicks 4.09v
    PL4 3.33v and after clicks 1.43v

    PL10 0v always

    Laptop won't power on and no battery charging


    Please help
    Attached Files
    Last edited by invisible4u4ever; 03-30-2017, 12:52 PM.
  • ktmmotocross
    Boardkiller
    • Feb 2014
    • 3575
    • slovakia

    #2
    Re: Toshiba A660 LA-6062P Clicking mainboard

    u have short in some switched power rail. in schematic i dont see pl10.

    Comment

    • invisible4u4ever
      Member
      • Aug 2015
      • 23
      • Germany

      #3
      Re: Toshiba A660 LA-6062P Clicking mainboard

      Here is PL10

      I check mainboard but I didn't find short... I will check again now...
      Attached Files

      Comment

      • invisible4u4ever
        Member
        • Aug 2015
        • 23
        • Germany

        #4
        Re: Toshiba A660 LA-6062P Clicking mainboard

        Sorry, wrong schema....

        Here is right one...

        I didn't find anything in short
        Attached Files

        Comment

        • HarryPK
          Badcaps Veteran
          • Mar 2014
          • 210
          • barabai

          #5
          Re: Toshiba A660 LA-6062P Clicking mainboard

          check b+ to all rail... maybe a resistor an open somewhere?!

          Comment

          • ktmmotocross
            Boardkiller
            • Feb 2014
            • 3575
            • slovakia

            #6
            Re: Toshiba A660 LA-6062P Clicking mainboard

            as first try another adapter, if making same, than
            inject 19V to B+ line to separate power problem, make jump from dc jack

            Comment

            • invisible4u4ever
              Member
              • Aug 2015
              • 23
              • Germany

              #7
              Re: Toshiba A660 LA-6062P Clicking mainboard

              I try with different charger... same thing happend

              you mean to put direct 19v here on pq6?
              Attached Files

              Comment

              • ktmmotocross
                Boardkiller
                • Feb 2014
                • 3575
                • slovakia

                #8
                Re: Toshiba A660 LA-6062P Clicking mainboard

                yes, on B+

                Comment

                • invisible4u4ever
                  Member
                  • Aug 2015
                  • 23
                  • Germany

                  #9
                  Re: Toshiba A660 LA-6062P Clicking mainboard

                  I try.... put 19v on B+

                  no clicking....now need help where to search for problem

                  Comment

                  • ktmmotocross
                    Boardkiller
                    • Feb 2014
                    • 3575
                    • slovakia

                    #10
                    Re: Toshiba A660 LA-6062P Clicking mainboard

                    power switching part. PQ8, PQ7 and its switching signals

                    Comment

                    • invisible4u4ever
                      Member
                      • Aug 2015
                      • 23
                      • Germany

                      #11
                      Re: Toshiba A660 LA-6062P Clicking mainboard

                      Maybe I'm so stupid but I cannot find short on that part... I check all components that I marked with orange...
                      I try to change PQ8 and PQ7 and same thing happening clicking when I plugin charger...

                      When I check with multimetar PC174 in buzzer mod I got 004 value and beeping is that normal?
                      Attached Files

                      Comment

                      • Zibbo
                        Badcaps Veteran
                        • Mar 2017
                        • 202
                        • Zimbabwe

                        #12
                        Re: Toshiba A660 LA-6062P Clicking mainboard

                        Chec current sensing circuit...PR45, PR59 and PR61.

                        Comment

                        • cyberhack
                          Badcaps Veteran
                          • Feb 2013
                          • 466
                          • Uk

                          #13
                          Re: Toshiba A660 LA-6062P Clicking mainboard

                          From all the above tests you have short on P2,I would lift PQ8 and retest
                          Last edited by cyberhack; 04-06-2017, 03:45 AM.

                          Comment

                          • invisible4u4ever
                            Member
                            • Aug 2015
                            • 23
                            • Germany

                            #14
                            Re: Toshiba A660 LA-6062P Clicking mainboard

                            same thing whitout PQ8... clicking...

                            Comment

                            • ktmmotocross
                              Boardkiller
                              • Feb 2014
                              • 3575
                              • slovakia

                              #15
                              Re: Toshiba A660 LA-6062P Clicking mainboard

                              check gate signals of all trasistors under pq7 in schematic
                              Last edited by ktmmotocross; 04-06-2017, 01:43 PM.

                              Comment

                              • invisible4u4ever
                                Member
                                • Aug 2015
                                • 23
                                • Germany

                                #16
                                Re: Toshiba A660 LA-6062P Clicking mainboard

                                PQ18 0v on gate and when board click after that got 2.16v
                                PQ14 0v on gate and when click got 1.45v

                                Comment

                                • ktmmotocross
                                  Boardkiller
                                  • Feb 2014
                                  • 3575
                                  • slovakia

                                  #17
                                  Re: Toshiba A660 LA-6062P Clicking mainboard

                                  PQ8, pq7, PQ18, PQ14,pq 13, pq10, pq20, pr55, pr64 - all pins
                                  Last edited by ktmmotocross; 04-07-2017, 08:52 AM.

                                  Comment

                                  • cyberhack
                                    Badcaps Veteran
                                    • Feb 2013
                                    • 466
                                    • Uk

                                    #18
                                    Re: Toshiba A660 LA-6062P Clicking mainboard

                                    Lift PQ7 and test

                                    Comment

                                    • gerores
                                      New Member
                                      • Jun 2019
                                      • 2
                                      • EspaƱa

                                      #19
                                      Re: Toshiba A660 LA-6062P Clicking mainboard

                                      I have one of this laptop and has few days ago the similar problem. Finaly i discover that the problem was a CPU burnt. I change it and now mobo start for a few seconds and stop . I think that i have now other problem whit the bios.
                                      Some one have's the bios bon file for this model, A660-13t?
                                      Y need this to programming whit the chip out of the board. Thanks

                                      Comment

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