MAC A1312 Screen Glitches at Boot Up

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  • Michale32086
    New Member
    • Nov 2011
    • 1453
    • USA
    #1

    MAC A1312 Screen Glitches at Boot Up

    I just got a MAC in.. Normally I don't mess with computers or laptops beyond a simple OS install..

    But this is a nice MAC and I decided it was worth some effort...

    It's an A1312 and what happens is a min or so into the boot-up I get a glitchy MAC apple and some glitchy-ness on the bottom of the screen..

    Memory is the only thing accessible and I confirmed that it's not a memory issue..

    I know MACs are a bear to disassemble.. So I wanted to get the opinions of what it might be before I commit to disassembly...
    Attached Files
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    • Dan81
      SNES-powered
      • Oct 2013
      • 1865
      • Romania
      #2
      Re: MAC A1312 Screen Glitches at Boot Up

      What GPU does it have?
      Main rig:
      Gigabyte B75M-D3H
      Core i5-3470 3.60GHz
      Gigabyte Geforce GTX650 1GB GDDR5
      16GB DDR3-1600
      Samsung SH-224AB DVD-RW
      FSP Bluestorm II 500W (recapped)
      120GB ADATA + 2x Seagate Barracuda ES.2 ST31000340NS 1TB
      Delux MG760 case

        Comment

        • Michale32086
          New Member
          • Nov 2011
          • 1453
          • USA
          #3
          Re: MAC A1312 Screen Glitches at Boot Up

          Not sure... It's one of those ALL IN ONE units that is all incorporated into the Monitor... Pulling it apart is a major chore...

            Comment

            • diif
              Badcaps Legend
              • Feb 2014
              • 6978
              • England
              #4
              Re: MAC A1312 Screen Glitches at Boot Up

              They aren't to much off a chore. Use suction cups to pull off the screen cover. It's attached with magnets. Then it's T10 Torx holding in the LCD panel.

              Looks like Radeon GPU issues. Replace/reflow/oven bake the GPU depending on your tools/skill level.

                Comment

                • Michale32086
                  New Member
                  • Nov 2011
                  • 1453
                  • USA
                  #5
                  Re: MAC A1312 Screen Glitches at Boot Up

                  That doesn't sound like a huge deal.... It's been a while since I disassembled a MAC...

                  Reflowing a GPU isn't a problem at all...

                  I'll give it a shot.. Thanx..

                    Comment

                    • Michale32086
                      New Member
                      • Nov 2011
                      • 1453
                      • USA
                      #6
                      Re: MAC A1312 Screen Glitches at Boot Up

                      OK, disassembly wasn't nearly as hard as I remembered...

                      Had a screw left over, but hopefully not an important one..

                      Did run into a bit of a snag though..

                      After reconnecting all the connectors and fan connectors and temp connectors, I have a plug left over.. I *THINK* there was something connected to it, but I can't find any cable that fits it.. It's possible the cable slipped behind the MB when I was pulling the video card, but not sure..

                      Anyone know if the marked plug actually has a cable attached???
                      Attached Files

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                        • Michale32086
                          New Member
                          • Nov 2011
                          • 1453
                          • USA
                          #7
                          Re: MAC A1312 Screen Glitches at Boot Up

                          Looks like that plug was superfluous or was for diagnostics or something..

                          Boots up good..

                            Comment

                            • christinejshaw
                              Member
                              • Jun 2018
                              • 13
                              • Canada
                              #8
                              Re: MAC A1312 Screen Glitches at Boot Up

                              Originally posted by Michale32086
                              Looks like that plug was superfluous or was for diagnostics or something..

                              Boots up good..
                              Or it could be an sensor...maybe just scan this video and it might give you some direction. https://www.youtube.com/watch?v=VpTgEmtN1LA

                                Comment

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