Asus Q502L does not boot up properly

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  • emadarion
    Member
    • Jun 2017
    • 43
    • Cairo

    #121
    Re: Asus Q502L does not boot up properly

    Thank you for sharing, very detailed, to see more times to remember

    Comment

    • tibimakai
      Badcaps Legend
      • Jan 2012
      • 3680
      • USA

      #122
      Re: Asus Q502L does not boot up properly

      Still not done with this laptop. I have purchased a used board from the bay, installed a brand new Samsung ssd, installed Windows 10 and all seemed fine for a few days. I have put it away for a few weeks.
      After awhile I have grabbed it, and it started acting up.
      What's in a while would not "see" the ssd and would boot into BIOS. If I rebooted, eventually would boot and work OK for a while.
      Now more often goes to BIOS, then in Windows.
      Replaced memory, HDD even the small daughter board for the HDD, still no change.
      Has the latest BIOS, all the updated, Windows 10 2004 and all.
      Any suggestion what should I do with it. Sometimes goes into blue screen as well.

      Comment

      • tibimakai
        Badcaps Legend
        • Jan 2012
        • 3680
        • USA

        #123
        Re: Asus Q502L does not boot up properly

        Nobody has encountered a disappearing HD situation, what could be?

        Comment

        • tibimakai
          Badcaps Legend
          • Jan 2012
          • 3680
          • USA

          #124
          Re: Asus Q502L does not boot up properly

          If I plug in a 2.5" HDD it shows the Sata port 0 as Empty.
          If I plug in an msata SSD, it shows Sata port 2 as Empty.
          If I don't plug in any HDD, shows all Sata ports Sata 0, #1, #2, #3, #4
          They all show Empty.
          What could be the problem here?
          What controls the Sata ports? The CPU, or there is a separate Sata controller?
          Any help would be greatly appreciated.

          Comment

          • tibimakai
            Badcaps Legend
            • Jan 2012
            • 3680
            • USA

            #125
            Re: Asus Q502L does not boot up properly

            It stopped recognizing any HDDs.

            Comment

            • Duranitron
              Badcaps Veteran
              • Jul 2014
              • 544
              • Philippines

              #126
              Re: Asus Q502L does not boot up properly

              if its not recognizing any ssd hdd try to clean the connectors. try to reinsert it.. try to boot using usb does it recognized the usb drive....do you happen to check the rtc battery maybe its way too low..
              Never stop LEARNING because life never stops TEACHING!

              Comment

              • tibimakai
                Badcaps Legend
                • Jan 2012
                • 3680
                • USA

                #127
                Re: Asus Q502L does not boot up properly

                I have even replaced the hdd daughter board, so it is hard to believe that the connector is causing these issues.
                I will check the connector, just in case.
                It recognizes a USB stick. Starts installing Windows, but it won't find a hdd.
                I haven't checked the battery, but it holds the date.

                Comment

                • tibimakai
                  Badcaps Legend
                  • Jan 2012
                  • 3680
                  • USA

                  #128
                  Re: Asus Q502L does not boot up properly

                  It's been a while since I have looked at this laptop, but I have just had a bulb turn on above my head.
                  The laptop hard drive, has to have a 12V supply as well, other than 3.3V and 5V supply?
                  I don't have it.
                  No matter what I try, HDD won't show in BIOS.
                  I would appreciate any help.

                  Comment

                  • piernov
                    Super Moderator
                    • Jan 2016
                    • 4435
                    • France

                    #129
                    Re: Asus Q502L does not boot up properly

                    No, 2.5" laptop HDD don't use 12V.
                    OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

                    Comment

                    • tibimakai
                      Badcaps Legend
                      • Jan 2012
                      • 3680
                      • USA

                      #130
                      Re: Asus Q502L does not boot up properly

                      What else could be, that no hdd shows up in the BIOS? 3.3V and 5V is there.

                      Comment

                      • tibimakai
                        Badcaps Legend
                        • Jan 2012
                        • 3680
                        • USA

                        #131
                        Re: Asus Q502L does not boot up properly

                        There is only the ITE IC and the CPU on this board. What could cause this issue?
                        BGA solder issue at the CPU?
                        Attached Files

                        Comment

                        • tibimakai
                          Badcaps Legend
                          • Jan 2012
                          • 3680
                          • USA

                          #132
                          Re: Asus Q502L does not boot up properly

                          Nobody can help?

                          Comment

                          • FrozenHaxor
                            Badcaps Veteran
                            • Jun 2015
                            • 260
                            • Poland

                            #133
                            Re: Asus Q502L does not boot up properly

                            Most likely cause is the PCH part of the CPU is bad, it controls SATA I/O directly.

                            Comment

                            • tibimakai
                              Badcaps Legend
                              • Jan 2012
                              • 3680
                              • USA

                              #134
                              Re: Asus Q502L does not boot up properly

                              Can't be solder balls cracking?
                              Thank you, for your reply.
                              How "easy" is to replace the CPU?

                              Comment

                              • FrozenHaxor
                                Badcaps Veteran
                                • Jun 2015
                                • 260
                                • Poland

                                #135
                                Re: Asus Q502L does not boot up properly

                                I have a BGA machine with optical system and it takes lots of experience to do it right. Intel CPUs are notorious for doing a "banana" and warping on cooldown, I avoid replacing them like a plague. I usually condemn boards that need this repair as it's not worth it most of the time, and new CPU itself will cost more than complete used working board in this case. If you suspect cracked BGA soldering then you could do a reflow, but all of the glue needs to go before doing it, and you still need a BGA rework station to avoid warping, especially on cooldown. If the laptop wasn't dropped and there was no physical shock to the mainboard, it is most likely internal PCH fault and they are notorious for such problems, even Intel admitted so years ago.

                                Comment

                                • tibimakai
                                  Badcaps Legend
                                  • Jan 2012
                                  • 3680
                                  • USA

                                  #136
                                  Re: Asus Q502L does not boot up properly

                                  Most likely I won't reball the CPU, just reflow it.
                                  What is interesting, that initially when I got the board from Ebay, it was working great, I have installed Windows, and it worked.
                                  After a while, it started to act up, sometimes it would not recognize the hdd, but a reboot took care of that. This started to become more frequent, until it would not recognize it at all.

                                  Comment

                                  • FrozenHaxor
                                    Badcaps Veteran
                                    • Jun 2015
                                    • 260
                                    • Poland

                                    #137
                                    Re: Asus Q502L does not boot up properly

                                    Does your HDD connect directly to the mainboard via ribbon or is there a daughter board with connector that mates to the mainboard?

                                    Comment

                                    • tibimakai
                                      Badcaps Legend
                                      • Jan 2012
                                      • 3680
                                      • USA

                                      #138
                                      Re: Asus Q502L does not boot up properly

                                      Daughter board. I have already purchased another one, and it is still the same issue.

                                      Comment

                                      • FrozenHaxor
                                        Badcaps Veteran
                                        • Jun 2015
                                        • 260
                                        • Poland

                                        #139
                                        Re: Asus Q502L does not boot up properly

                                        Did you inspect the other part of the connector on the mainboard? Some Asus boards are prone to failures of them causing odd issues. If it's okay then it's a PCH problem.

                                        Comment

                                        • tibimakai
                                          Badcaps Legend
                                          • Jan 2012
                                          • 3680
                                          • USA

                                          #140
                                          Re: Asus Q502L does not boot up properly

                                          Yes, I have when over with the solder iron.

                                          Comment

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