Ailenware 17 R4

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  • davem12
    Member
    • May 2019
    • 11
    • USA
    #1

    Ailenware 17 R4

    Hello,

    I am working on an Ailenware 17 R4 M/B BAP10 LA-D751P Rev 1.0
    I am getting a two red and one blue code on the power button which said CPU fail. I tried removing the battery connector and the bios batter reset, no help. I also re-flowed the CPU and I still have the same error. I believe that the CPU overheated and failed, is there anything else I can try?

    Thank You
    Tags: None
    • Duranitron
      Badcaps Veteran
      • Jul 2014
      • 544
      • Philippines
      #2
      Re: Ailenware 17 R4

      try to check all the voltage rail.. specially the voltage for the processor..1.2 or 1v is good.. but try to see if it overheats.is the processor fan spinning? did you check the fan? reflowing the processor without the proper tool can kill it.. if there is no processor voltage.. try to look for short circuit in the processor side.. short circuit meaning 0 ohm. it is not common to have a defective processor because it has a built in protection for over heating and over voltage..but of course it has always an exception. my opinion.. its likely to have a failed chip if the processor have a built in gpu..
      Never stop LEARNING because life never stops TEACHING!

        Comment

        • RJARRRPCGP
          Badcaps Legend
          • Jul 2004
          • 6304
          • USA
          #3
          Re: Ailenware 17 R4

          May be bad SMD CPU caps.
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            Comment

            • davem12
              Member
              • May 2019
              • 11
              • USA
              #4
              Re: Ailenware 17 R4

              Thank You for your feedback and troubleshooting tips, I will look into this.
              I need to figure out where is the voltage rail at.

              What happened was the owner never cleaned the cooling fans and they were full of dust and hair until she got a CPU overheat code. When it is powered on now, the cooling fans come on for 7 seconds and goes out for 3 seconds. It does this several times until the power led flashes 2 red and 1 blue code, then the cooling fans go to full speed.

              When researching the CPU failure, this has been a common occurrence with this laptop and some were within a year old.

              Thank you
              Last edited by davem12; 07-12-2020, 06:13 PM.

                Comment

                • mcplslg123
                  Badcaps Legend
                  • Jun 2015
                  • 7262
                  • india
                  #5
                  Re: Ailenware 17 R4

                  You need to check voltage on all big grey coils.

                    Comment

                    • Duranitron
                      Badcaps Veteran
                      • Jul 2014
                      • 544
                      • Philippines
                      #6
                      Re: Ailenware 17 R4

                      experienced that symptoms in Lenovo laptop the fan is gummed up, laptop always power off for 10 minutes but the costumer keep on using it for almost a year. see how reliable intel processors are then this symptom came.. no display the fan spins at full speed. all voltage rail are at the correct values.. what i did is clean the processor fan put some fresh thermal paste and i reflash the bios.. that solves it.. maybe try to reflash the bios.. the frequent on and off state of the unit must corrupted the bios..
                      Never stop LEARNING because life never stops TEACHING!

                        Comment

                        • davem12
                          Member
                          • May 2019
                          • 11
                          • USA
                          #7
                          Re: Ailenware 17 R4

                          Thanks for all the info,

                          I tried using the SOIC clip and got errors. I will de-solder the chip and read it and save original Bios. Is there any specific Bios that worked well for this board. It is a Winbond 25Q80DVS1G chip.

                          Thank You
                          David

                            Comment

                            • SMDFlea
                              Super Moderator
                              • Jan 2018
                              • 21946
                              • UK
                              #8
                              Re: Ailenware 17 R4

                              Originally posted by davem12
                              Thanks for all the info,

                              I tried using the SOIC clip and got errors. I will de-solder the chip and read it and save original Bios. Is there any specific Bios that worked well for this board. It is a Winbond 25Q80DVS1G chip.

                              Thank You
                              David

                              The bios you want is marked 25Q128 . https://www.badcaps.net/forum/showthread.php?t=85876 .You can try the bios from post #12 ,if you want your own service tag adding you should post your own bios backup in that thread.

                              .
                              Last edited by SMDFlea; 07-13-2020, 04:50 PM.
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                                Comment

                                • davem12
                                  Member
                                  • May 2019
                                  • 11
                                  • USA
                                  #9
                                  Re: Ailenware 17 R4

                                  Wow,

                                  That was a really quick response. Went to take it apart and just found the 25Q128 labeled UH4 and was going to update my findings and you beat me too it. Thanks for the information and the link

                                  Dave

                                    Comment

                                    • davem12
                                      Member
                                      • May 2019
                                      • 11
                                      • USA
                                      #10
                                      Re: Ailenware 17 R4

                                      Hello,

                                      I flashed the firmware, no help. I found a leaking inductor at the CPU. The inductor measures 4.18mm LxW 1.83mm H. I believe that it is a series 4020 chip. The part I found is SRP4020TA-1R0M, would this be the correct one and will this cause the CPU overheat fault code?

                                      Sorry for the noob questions. I'm new at this.

                                      Thank You very much for your help
                                      Dave
                                      Attached Files

                                        Comment

                                        • Duranitron
                                          Badcaps Veteran
                                          • Jul 2014
                                          • 544
                                          • Philippines
                                          #11
                                          Re: Ailenware 17 R4

                                          1uH inductor coil try to clean the board and put new 1R0 coil try also remove the mosfet connected to this coil and replace it.. and see how it goes... please post progress
                                          Never stop LEARNING because life never stops TEACHING!

                                            Comment

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