Released June 2012, Model A1278. Intel processor with Turbo Boost, Up to 512 MB DDR5 Video RAM

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Screen glitches, computer freezes, & ram must be reseated often

I've resorted to keeping my computer on a pedestal & using a wireless keyboard & mouse, so I never have to touch it except to gently plug the power in. Even so, multiple times a day, I encounter the same scenario: The computer freezes, the screen glitches with what look like a bunch of barcodes, then the telltale 3-beep. After reseating the ram, everything works fine, if a little slow. What once happened every few days, now occurs 3-5 times a day. I've searched online for replacement logic boards, but the ones that show up with my criteria don't look like the one in my computer. Thoughts?

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Are the barcodes pink and go from top to the bottom of the screen or are they white and go from left to right of the screen?


Hi, @jennessee had you tested your memory yet?

Try using apple diagnostic to test the hardware


@salmonjapan I replaced the memory, which seems to be a temporary fix. The problem doesn't happen as often. After a little more poking around, I have discovered that the top ram slot doesn't hold securely. It looks like I will need to replace the logic board after all.


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Try testing your memory. If it comes back fine, you may need a new board. If not, I would consider finding the faulty stick(s) and replace them and see if it works. Good luck!

EDIT: Use Apple Memory Diagnostic

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Jennessee Rosenberg will be eternally grateful.
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