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    820-00281 random shut off

    Laptop is like new with only 17 cycles. Shuts off randomly, does not restart on its own. No report. completely clean and untouched. Do these have any mosfet issue?
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    820-01814 only boots in safe mode after liquid

    Got some new original chips and still not working :( Moving on.
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    820-00426 fails to boot with trackpad connected

    So another new battery and both boards booted no problem. Strangely, I put them back in their original cases and they worked with those batteries now. The trackpad threw me off with these. That and I had to go through 3 ‘good’ batteries to make it work.
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    820-00426 fails to boot with trackpad connected

    Ordered an aftermarket battery. If that was the issue would an aftermarket battery even resolve it?
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    820-01814 only boots in safe mode after liquid

    So the type of chip doesn’t matter 532 vs 535?
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    820-01814 only boots in safe mode after liquid

    Same result with external. Tried with internal connected and disconnected.
  7. T

    820-00426 fails to boot with trackpad connected

    Out of other batteries. Used last one I used was working with another machine. safe mode doesn’t work.
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    820-00426 fails to boot with trackpad connected

    The other Mac allowed me to run diag. Came back no issues.
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    820-00426 fails to boot with trackpad connected

    Diagnostics won’t run. I can select a language and agree but the progress bar never comes up and the courser freezes.
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    820-01814 only boots in safe mode after liquid

    Used u7420 from 00928.. from the schematic I thought they were the same but the lettering on the chip is different. 820-01814 - SIC532 BE 820-00928 - SIC535 AF I used schematic for 820-01041. Which says SIC535.
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    820-01814 only boots in safe mode after liquid

    Liquid damage near u7420. Board had a short prior to replacing u7420. Replaced and all seemed good. When booting it gets half way, the fans spin up fast and it restarts. In safe mode it boots fine. Attaching panic report. Same after restoring.
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    820-00426 fails to boot with trackpad connected

    I misunderstood. Just tried and still does the same with u4850 left off.
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    820-00426 fails to boot with trackpad connected

    They both restart. 15 seconds. Yes good battery.
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    820-00426 fails to boot with trackpad connected

    I have two of these boards now with the same issues. They crash about 25% into booting. If trackpad is disconnected they will boot fine. tried both in good cases and they still fail to boot. Ive seen older posts about this but they weren’t resolved.
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    820-00840

    No ROM data found. Copied from another board and it fired right up.
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    820-00840

    Received from someone that attempted to remove EFI lock with a Chip Card. Worked prior but didn't work after install. Q3730 was knocked off and has been replaced. ppbus_g3h - 13v Good until pp3v3_s4 and pp5v_s4 - 0v. No short. (same before q3730 replaced). p3v3_sus - 3.4v r7020 - 20v...
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    820-00281 critical update

    Finished the top case swap. Original display with cam connected and TouchID switched over. Everything works now.
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