Apple iMac A1419 820-4652

Discussion in 'BIOS/UEFI' started by technical, Sep 18, 2016.

Apple iMac A1419 820-4652 5 5 1votes
5/5, 1 vote

  1. technical

    technical Moderator Staff Member

    Joined:
    Dec 13, 2013
    Messages:
    64,627
    Likes Received:
    4,527
    Apple iMac A1419 820-4652-A
    BIOS Mid 2015
     

    Attached Files:

    • Like Like x 3
  2. Loading...

    Similar Threads - Apple iMac A1419 Forum Date
    Apple iMac A1419 820-3478-A BIOS/UEFI Dec 22, 2015
    Apple Apple iMac 27 A1419 D8 051-9505 820-3299_051-9505 800 Schematics Jan 6, 2014
    APPLE iMac 21.5" A1418 820-01061-A BIOS/UEFI Aug 17, 2019
    820-00609-A Apple iMac 27" 5K Retina BIOS/UEFI May 26, 2018
    Apple.HD6970M.2048.110128 (IMAC A1312 HD6970 2GB VGA ATI 216-0811000) ELECTRONIC DEVICE Sep 24, 2017

  3. Gurmeet bhatia

    Gurmeet bhatia Well-Known Member

    Joined:
    Sep 22, 2016
    Messages:
    15
    Likes Received:
    2
    above bios not working
     
  4. technical

    technical Moderator Staff Member

    Joined:
    Dec 13, 2013
    Messages:
    64,627
    Likes Received:
    4,527
    not working how?
    old bios and macbook error what?
    Please provided many info where want i help.
     
  5. Gurmeet bhatia

    Gurmeet bhatia Well-Known Member

    Joined:
    Sep 22, 2016
    Messages:
    15
    Likes Received:
    2
    the customer original bios give giving display on USB and external after removing the internal LCD

    if you put the LCD the machine turn off / restart after the CHIME sound comes before the display .

    i want to try first with the working bios . then later i check other problems .
     
  6. technical

    technical Moderator Staff Member

    Joined:
    Dec 13, 2013
    Messages:
    64,627
    Likes Received:
    4,527
    bios above work 100% can only is Me Region problem, you can Clear me or send file old i help.
     
  7. hernan tangoa f.

    hernan tangoa f. Well-Known Member

    Joined:
    Mar 20, 2015
    Messages:
    47
    Likes Received:
    2
    schematic and boardview please 820-4652-A
     
  8. technical

    technical Moderator Staff Member

    Joined:
    Dec 13, 2013
    Messages:
    64,627
    Likes Received:
    4,527

    Attached Files:

  9. Nenad63

    Nenad63 New Member

    Joined:
    Aug 1, 2018
    Messages:
    15
    Likes Received:
    0
    The iMac worked on the extern display via the minidisplayport, after rewriting the dump with your dump file, only the first two LEDs are logging in, no sound. And unfortunately when I get my dump, the guy looks the same - dead. I'll send you your dump file, so I hope your help.Nenad
     

    Attached Files:

  10. technical

    technical Moderator Staff Member

    Joined:
    Dec 13, 2013
    Messages:
    64,627
    Likes Received:
    4,527
    A1416 820-4652-A mx25L6406e.bin
     

    Attached Files:

  11. Nenad63

    Nenad63 New Member

    Joined:
    Aug 1, 2018
    Messages:
    15
    Likes Received:
    0
    Hope it is not a problem with chip model, 25Q064A is on my logic board
     
  12. Nenad63

    Nenad63 New Member

    Joined:
    Aug 1, 2018
    Messages:
    15
    Likes Received:
    0
    Not this dump, they are not the same size
     
  13. Nenad63

    Nenad63 New Member

    Joined:
    Aug 1, 2018
    Messages:
    15
    Likes Received:
    0
    do you still have an idea
     
  14. technical

    technical Moderator Staff Member

    Joined:
    Dec 13, 2013
    Messages:
    64,627
    Likes Received:
    4,527
    No problem, I want to know the results after programming ?
     
  15. Nenad63

    Nenad63 New Member

    Joined:
    Aug 1, 2018
    Messages:
    15
    Likes Received:
    0
    Programming is OK, but iMac does not start....

    iMac 3.5 GHz Core i5 iMac iD 15.1
    Apple iMac A1419 Late 2014 Mid 2015 Mf886LL 27" Logic Board 820-4652-A 661-00191
     
  16. technical

    technical Moderator Staff Member

    Joined:
    Dec 13, 2013
    Messages:
    64,627
    Likes Received:
    4,527
    can have hardware error ?
     
  17. Nenad63

    Nenad63 New Member

    Joined:
    Aug 1, 2018
    Messages:
    15
    Likes Received:
    0
    Unbelievably, until about an hour ago, iMac worked with an external display...
     
  18. technical

    technical Moderator Staff Member

    Joined:
    Dec 13, 2013
    Messages:
    64,627
    Likes Received:
    4,527
    now have work external display ? can give one photo.
    and can try add bios clear me i update on top.
     
  19. Nenad63

    Nenad63 New Member

    Joined:
    Aug 1, 2018
    Messages:
    15
    Likes Received:
    0
    no, no external display now, only the fan starts and the first two LEDs..
     
  20. Nenad63

    Nenad63 New Member

    Joined:
    Aug 1, 2018
    Messages:
    15
    Likes Received:
    0
    in any case, thank you for your help
     
  21. technical

    technical Moderator Staff Member

    Joined:
    Dec 13, 2013
    Messages:
    64,627
    Likes Received:
    4,527
    now BIOS old you send same problem not work ?
    check hardware all Please
     
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice