Imac A1311 MLB 820-3126-A dead

Discussion in 'Computer Hardware Repair' started by erguro, Dec 26, 2018.

  1. erguro

    erguro New Member

    Joined:
    Dec 23, 2018
    Messages:
    12
    Likes Received:
    0
    Dear technicians and engineers

    First of all, merry Christmas, I need to fix a mid 2011 Imac A1311 with MLB 820-3126-A
    It,s my first time with imacs I heard that is very common SMC failures and Ati radeon hd6750m gpu failures

    MLB is dead no start no chime only high speed fans so I think is a smc failure, could you help me to start checking mlb? Now I have all the info, schematics and brd files but It will be great with a first steps tips in mlb check, I tested psu voltages and are ok

    Thanks in advance

    Best regards
     
    #1 erguro, Dec 26, 2018
    2. Loading...

    Similar Threads - Imac A1311 3126 Forum Date
    Apple iMAC a1311 820-3126-a BIOS/UEFI Jul 7, 2015
    Apple iMAC A1311 21.5 820-2136-A BIOS/UEFI Jul 12, 2015
    Apple Apple Imac A1311 21,5'' 820-2494-A BIOS/UEFI Jun 26, 2015
    Apple 051-7845 - SCH,K22,MLB - K22 Apple iMac A1311 Schematics Oct 2, 2014
    Apple Apple iMac A1311 K74 051-8337 820-2784 Schematics Oct 2, 2014

  2. erguro

    erguro New Member

    Joined:
    Dec 23, 2018
    Messages:
    12
    Likes Received:
    0
    any idea will be apreciated

    thanks
     
    #2 erguro, Dec 26, 2018
  3. technical

    technical Moderator Staff Member

    Joined:
    Dec 13, 2013
    Messages:
    64,627
    Likes Received:
    4,729
    we have support you in inbox.
     
    • Sad Sad x 1
    #3 technical, Dec 26, 2018
  4. erguro

    erguro New Member

    Joined:
    Dec 23, 2018
    Messages:
    12
    Likes Received:
    0
    Yes but not to this question
     
    #4 erguro, Dec 26, 2018
  5. technical

    technical Moderator Staff Member

    Joined:
    Dec 13, 2013
    Messages:
    64,627
    Likes Received:
    4,729
    Nobody can say exactly, all needs to try.
    You can't fix it with just a few questions.
    Let's start testing from the most basic components....
     
    #5 technical, Dec 26, 2018
  6. erguro

    erguro New Member

    Joined:
    Dec 23, 2018
    Messages:
    12
    Likes Received:
    0
    That's exactly what I ask to you, how to test smc? obviously because I don´t know the answer
     
    #6 erguro, Dec 26, 2018
  7. technical

    technical Moderator Staff Member

    Joined:
    Dec 13, 2013
    Messages:
    64,627
    Likes Received:
    4,729
    SMC is can not check, you need try one BIOS new.
    you only can reset SMC where mac have display or ignore it if the Mac has no display...
     
    #7 technical, Dec 26, 2018
  8. erguro

    erguro New Member

    Joined:
    Dec 23, 2018
    Messages:
    12
    Likes Received:
    0
    MLB is dead new BIOS didn´t worked for me
     
    #8 erguro, Dec 26, 2018
  9. technical

    technical Moderator Staff Member

    Joined:
    Dec 13, 2013
    Messages:
    64,627
    Likes Received:
    4,729
    check haware.
     
    • Angry Angry x 1
    #9 technical, Dec 26, 2018
  10. erguro

    erguro New Member

    Joined:
    Dec 23, 2018
    Messages:
    12
    Likes Received:
    0
    wow thanks that's an awesome idea, SMC is hardware or is a cat?
     
    #10 erguro, Dec 26, 2018
  11. technical

    technical Moderator Staff Member

    Joined:
    Dec 13, 2013
    Messages:
    64,627
    Likes Received:
    4,729
    #11 technical, Dec 26, 2018
  12. Ricardo Marcelo

    Ricardo Marcelo New Member

    Joined:
    Sep 24, 2016
    Messages:
    1
    Likes Received:
    0
    olá , amigo faça um reballing apenas no SMC, vai resolver seu problema !
     
    #12 Ricardo Marcelo, Feb 28, 2019
(You must log in or sign up to post here.)
  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.
    Accept Learn More...
    Dismiss Notice