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A1398 2015 9 beeps ? Efi bios ?

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    #1

    A1398 2015 9 beeps ? Efi bios ?

    hi i have a macbook pro 15 i believe 2015 a1398 from the looks of the bios chip and board layout. Well it has 9 beeps and doesnt turn on..ive heard it the efi bios chip? is there preprogramed chip that i can buy or do i have to reprogram the ic ? i did buy a efi reader and bios chip that looks little diff ( has legs like for the 2014 a1398 efi ) the one i have is newer flat type smd .
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    #2
    Re: A1398 2015 9 beeps ? Efi bios ?

    Anyone ??

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      #3
      Re: A1398 2015 9 beeps ? Efi bios ?

      Is it 3 short, 3 long, 3 short? If so, then yes might be corrupt firmware.

      You need to find the board number first, it's usually down the bottom on the LHS (e.g. 820-00138). You have to match up the firmware from the board, you should be able to get a donor from the BIOS group (if there isn't one you can request it). You will have to edit in your serial number and fix the checksum in the Fsys block.

      I usually take the chip off and put in my reader to program. I think there are some sellers on eBay that sell pre-programmed chips.

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        #4
        Re: A1398 2015 9 beeps ? Efi bios ?

        ok i bought the usb programmer took out the bios chip and soldered it on the board but before i plug it in the pc i noticed pin 2 3 4 all have continuity with each other? is that normal? i adjusted the ic it was a little off as u can see in the pic. If ic is bad and cant read anything off of it , where can i download full dump for this particular board? i know its a 2015 MBP thats it lol no EMC bc the back cover is not original so not printed on it.
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          #5
          Re: A1398 2015 9 beeps ? Efi bios ?

          The middle of the chip is metal and is likely shorting onto the pads. Centre the chip and retry.

          As I said previously you need to identify the board number first as far as donor BIOS goes, and then request (or find one) in the BIOS group on Badcaps.

          https://logi.wiki/index.php/Board_Nu...o_15.22_Retina

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            #6
            Re: A1398 2015 9 beeps ? Efi bios ?

            Originally posted by reformatt View Post
            The middle of the chip is metal and is likely shorting onto the pads. Centre the chip and retry.

            As I said previously you need to identify the board number first as far as donor BIOS goes, and then request (or find one) in the BIOS group on Badcaps.

            https://logi.wiki/index.php/Board_Nu...o_15.22_Retina
            your exactly right! it was shorting.. read the bios and how can i find the serial number or emc in the dump? it a 820-00163-a can you provide me with a clear efi for my board and i can just wriite it over this one? or here is my original bios dump
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              #7
              Re: A1398 2015 9 beeps ? Efi bios ?

              Dumps are available in this thread for that board:

              https://www.badcaps.net/forum/showth...ight=820-00163

              Piernov has an a video on YT on how to edit it in and update your checksum in the Fsys block using the UEFItool and a hex editor (I use HxD). Your serial is at offset 00D9006F BTW.

              https://www.youtube.com/watch?v=poA8...hannel=piernov

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