Compaq with power issue

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  • emmanuelbill1988
    Senior Member
    • Mar 2017
    • 100
    • ghana
    #1

    Compaq with power issue

    Please i have this Compaq presario CQ60,when my costumer brought it a caps was burnt on the board and after clearning and changing the spoilt capasitor i notice U47 ic was warming,i changed it and i have power on the board now but when i press the switch the laptop doesn't on,i made another check on the board and notices any ic on the board warms again,please can any one help me with the diagram of the board
    Astrosphere MCP MB
    07241-5
    48.4J103.051
    That is the board number,tnx in advance
    Tags: None
    • piernov
      Super Moderator
      • Jan 2016
      • 4439
      • France
      #2
      Re: Compaq with power issue

      Should be this one.
      Attached Files
      OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

        Comment

        • emmanuelbill1988
          Senior Member
          • Mar 2017
          • 100
          • ghana
          #3
          Re: Compaq with power issue

          Please which page do you think i should check?

            Comment

            • emmanuelbill1988
              Senior Member
              • Mar 2017
              • 100
              • ghana
              #4
              Re: Compaq with power issue

              Please mine is CQ60,any one

                Comment

                • piernov
                  Super Moderator
                  • Jan 2016
                  • 4439
                  • France
                  #5
                  Re: Compaq with power issue

                  MB is Wistron Astrosphere, should be ok. Check if 3.3V/5V is present and if you have 3.3V on power button. Check if PM_RSMRST#, PWRBTN#_MCP and PM_SLP_S5# gets high after pressing power button.
                  OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

                    Comment

                    • emmanuelbill1988
                      Senior Member
                      • Mar 2017
                      • 100
                      • ghana
                      #6
                      Re: Compaq with power issue

                      After making the checks am not getting 3.3v under switch and U56 becomes hot when i put in the charger but power jack Led shows on,please what maybe the cause of U56 becoming hot?tnx

                        Comment

                        • mielta
                          Badcaps Veteran
                          • Apr 2015
                          • 368
                          • Germany
                          #7
                          Re: Compaq with power issue

                          Hi
                          Messure Pin8,16,17 from icU56

                            Comment

                            • emmanuelbill1988
                              Senior Member
                              • Mar 2017
                              • 100
                              • ghana
                              #8
                              Re: Compaq with power issue

                              After measuring with charger plugged in i had
                              Pin8-3.2v
                              pin16-4.9v
                              Pin17-0v

                                Comment

                                • mielta
                                  Badcaps Veteran
                                  • Apr 2015
                                  • 368
                                  • Germany
                                  #9
                                  Re: Compaq with power issue

                                  messure Pin17 because a short to ground
                                  also can U56 be defect

                                    Comment

                                    • emmanuelbill1988
                                      Senior Member
                                      • Mar 2017
                                      • 100
                                      • ghana
                                      #10
                                      Re: Compaq with power issue

                                      After taking measure again i got
                                      Pin8/3.2v
                                      Pin16/18.9v
                                      Pin17/4.9v
                                      Thats when i plug in the charger,is U56 defeat?

                                        Comment

                                        • wisnak
                                          New Member
                                          • Apr 2018
                                          • 1
                                          • sweden
                                          #11
                                          Re: Compaq with power issue

                                          I have the same motherboard CQ60 and the power jack led is on when i pluck the adapter and led 1 is on when i press the power button no led 3 and there no firther action and the the U48 start to be warm as usual and cpu fan not spinning, where i will start searching? any one has the boardview cause i cant finde som component like U47 or U56..?
                                          than you in advance

                                            Comment

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