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A7S333 1 long beep 3 short beep and shut down ?

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    #41
    Re: A7S333 1 long beep 3 short beep and shut down ?

    On POST code diagnostic I got C1 and motherboard is off after that....
    What does it say to me ? any experiences ?

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      #42
      Re: A7S333 1 long beep 3 short beep and shut down ?

      can it be the audio modem chip is short and making all the system shutdown...?
      It's the closest to LM78L05
      https://cdn.badcaps-static.com/pdfs/...c2f51bc7b4.pdf
      Attached Files

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        #43
        Re: A7S333 1 long beep 3 short beep and shut down ?

        C1
        Detect memory
        -Auto-detection of DRAM size, type and ECC

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          #44
          Re: A7S333 1 long beep 3 short beep and shut down ?

          but it shut off after showing C1.....how do you reckon ? is it something wrong with my VRM
          ? I've replaced all the FET and Caps...but no avail...could be my buck controller and driver ?
          NCP5322 ?

          Comment


            #45
            Re: A7S333 1 long beep 3 short beep and shut down ?

            LM78L05ACM is connected directly to 74HC4053...which a logic HCMOS chip...
            I have no idea what's it doing yet ??

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              #46
              Re: A7S333 1 long beep 3 short beep and shut down ?

              74HC4053, could it be died already ? and making the system shut off ??

              Comment


                #47
                Re: A7S333 1 long beep 3 short beep and shut down ?

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                  #48
                  Re: A7S333 1 long beep 3 short beep and shut down ?

                  exact chip :

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                    #49
                    Re: A7S333 1 long beep 3 short beep and shut down ?

                    Is it possible that I get a corrupted BIOS ?

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                      #50
                      Re: A7S333 1 long beep 3 short beep and shut down ?

                      can I upload this one
                      http://dlcdnet.asus.com/pub/ASUS/mb/...316.1472338911
                      straight away with chip flash programmer ? thanks

                      Comment


                        #51
                        Re: A7S333 1 long beep 3 short beep and shut down ?

                        1 long and 3 short beeps is no VGA detected.

                        https://www.asus.com/support/faq/1029959

                        Are you testing with a known quality working PSU ?
                        Last edited by diif; 08-28-2016, 07:22 PM.

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                          #52
                          Re: A7S333 1 long beep 3 short beep and shut down ?

                          Yes I'm using a working PSU...I've tested this PSU with other mobo...works ok...
                          I will try changing buck controller and see...

                          either death buck or corrupted BIOS or both...

                          Comment


                            #53
                            Re: A7S333 1 long beep 3 short beep and shut down ?

                            I got progress....I've replaced all the FET and now it bot until displaying C1C1 on POST diagnostic...beep...and shut down...
                            I think it's NCP5322 buck controller not right....
                            Do you reckon ?

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                              #54
                              Re: A7S333 1 long beep 3 short beep and shut down ?

                              from physical appearance, looks like NCP5322 buck controller is burned, please have a look at the photo...
                              Attached Files

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                                #55
                                Re: A7S333 1 long beep 3 short beep and shut down ?

                                Are you serious ? You can't see anything in that photo.

                                Comment


                                  #56
                                  Re: A7S333 1 long beep 3 short beep and shut down ?

                                  Can't you see the chip next to CPU on the right ?....ok, I'll try taking picture again...

                                  Comment


                                    #57
                                    Re: A7S333 1 long beep 3 short beep and shut down ?

                                    Another photo...hope it's better now...
                                    Attached Files

                                    Comment


                                      #58
                                      Re: A7S333 1 long beep 3 short beep and shut down ?

                                      I can't read the label on NCP5322, because of burn I suppose...must take a good closer look with magnifying glass to see its label....

                                      Comment


                                        #59
                                        Re: A7S333 1 long beep 3 short beep and shut down ?

                                        Buck controller seems fine to me.

                                        Why do you always think it's the buck controller that's the problem?
                                        Honestly, from all of the motherboards I got in for repair, I've never had to replace a buck controller. Maybe a few FETs and the occasional FET driver. The buck controller is protected pretty well.

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                                          #60
                                          Re: A7S333 1 long beep 3 short beep and shut down ?

                                          I have replaced all the FETs and it's still happened....turn on trying to POST and shut off after few seconds ?? do you know what else then ?

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