Acer 5236/5536 BIOS issue?

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  • Spider1211
    Badcaps Veteran
    • Oct 2019
    • 532
    • Mauritius
    #1

    Acer 5236/5536 BIOS issue?

    Hey guys, grateful if anyone can provide known good dump for acer 5236/5536

    Motherboard: 08252-2. jv50-pu mb 48.4ch01.021

    Laptop issue: When power button is pressed, fans ramps to maximum power with no display and boards cut off after about 10-15seconds (sometimes it goes up to 20seconds).

    Power draw @19.7V:
    Idle: 20mA
    On: 1.028A

    All power rails are present and stable when turned on.

    No shorts found on board and stable 32KHz and 25MHz clock observed.

    Tried different RAM with no luck.

    Tried BIOS file obtained from: https://www.badcaps.net/forum/showthread.php?t=59082 but issue is still the same.

    Please find attached original BIOS dump.
    Attached Files

    if you find these attachements useful please consider making a small donation to the site

    Tags: None
    • piernov
      Super Moderator
      • Jan 2016
      • 4439
      • France
      #2
      Re: Acer 5236/5536 BIOS issue?

      Make sure you are using a compatible CPU (different generation of S1 socket are not compatible), could also be a dead northbridge or GPU.
      OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

        Comment

        • Spider1211
          Badcaps Veteran
          • Oct 2019
          • 532
          • Mauritius
          #3
          Re: Acer 5236/5536 BIOS issue?

          Motherboard in non GPU Version. As far as I know, CPU has not been touched and is the same one as originally supplied with motherboard.

          Laptop came in and had obvious signs it had been worked on by someone else. Besides some pretty bad soldering job (which has already been corrected).

          I doubt i'll be going as far as troubleshooting northbridge (if as suggested could be potentially the case here).

          Having a known good BIOS would have been an easy test before deciding if its worth digging deeper. I might try replacing the CPU with a compatible one as you suggested if I have one lying around.

            Comment

            • resistor83
              Senior Member
              • Oct 2018
              • 127
              • Italy
              #4
              Re: Acer 5236/5536 BIOS issue?

              hello all, i also have a black screen problem on the 5536 model, i have already tried the reflow both on the northbridge and on the southbridge but nothing.
              I wanted to try to flash the bios but with my TL866 I have problems flashing.

              In reads I have to uncheck "verify id" otherwise it won't read me anything.
              When I go to program instead it gives me this:
              Attached Files

              if you find these attachements useful please consider making a small donation to the site

                Comment

                • lapfix
                  Badcaps Legend
                  • Mar 2020
                  • 2764
                  • my workshop
                  #5
                  Re: Acer 5236/5536 BIOS issue?

                  Clean bios pad and try again

                    Comment

                    • resistor83
                      Senior Member
                      • Oct 2018
                      • 127
                      • Italy
                      #6
                      Re: Acer 5236/5536 BIOS issue?

                      yes I have already tried, I have also tried to change chips taken from another motherboard always the same

                        Comment

                        • lapfix
                          Badcaps Legend
                          • Mar 2020
                          • 2764
                          • my workshop
                          #7
                          Re: Acer 5236/5536 BIOS issue?

                          Try disable verify after
                          Attached Files

                          if you find these attachements useful please consider making a small donation to the site

                            Comment

                            • resistor83
                              Senior Member
                              • Oct 2018
                              • 127
                              • Italy
                              #8
                              Re: Acer 5236/5536 BIOS issue?

                              thank you, now its work!

                                Comment

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