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  1. Zeifurhugen

    820-00244 - bad CPU/Boots to file with ?

    Sorry to resurrect this thread. I have done 3x CPU swaps to 820-00244. Each one of these boards has initially had a burned up U7210 and L7210 which killed the CPU, the boards all have no power originally. I then changed CPU to new CPU and all 3 of the boards turned on. The problem is that all...
  2. Zeifurhugen

    Liquid 820-00850 3v3_g3h blowing charging chips

    Hi, I have a liquid damaged 820-00850. I had to replace U7800, U8250, U3730 and UB000 to clear all of the short circuits from the liquid damage. I replaced all 4 UCB-C Charging chips (UB300, UB400, U3100, U3200) After replacing all 4 charging chips I plugged the device into power and...
  3. Zeifurhugen

    820-01041 no boot, liquid damage.

    Hi thanks again for your support. I now have a ROM reader, I have a good ROM dump from a good A1990. Is the data at jeopardy if the ROM dump has the wrong serial number/UUID? Thanks again.
  4. Zeifurhugen

    820-01700 // Will not startup // U1200 extreme heat

    L7211 is very stable at .95V Unfortunately I can't restore the T2 as the data is very important. Apologies, but when you say check for USB activity, what do you mean? Thanks :)
  5. Zeifurhugen

    820-00244 - bad CPU/Boots to file with ?

    sorry 2.8v was typo! 1.8v is correct. I assume controller is U8600? Thank you
  6. Zeifurhugen

    820-00244 - bad CPU/Boots to file with ?

    Hi I have 820-00244 MacBook Board, it originally had burned/discolored U7210/L7210. I replaced U7210 and L7210 and it still would not boot. I figured damaged/bad CPU, so I replaced CPU on my BGA rework station. Now the MacBook boots normally but it is not detecting internal SSD (Boots to...
  7. Zeifurhugen

    820-01700 // Will not startup // U1200 extreme heat

    PP3V3_S5 - 3.38V PP1V8_S5 - 1.79V PP1V05_PRIM - 1.03V PP1V05_PRIM_PCH_VCCAXTAL_F - 1.03V PP1V05_PRIM_PCH_VCCAPLL_F - 1.03V PP1V05_S5_PCH_VCCDSW - 1.03V PPVCCSPI_PRIM_PCH - 3.33V PP1V8_S0_PCH_VCCHDA_F - 1.79V PP3V0_G3H_RTC - 3.0V PPDCPRTC_PCH - 1.51V PP1V24_S5_PCH_VCCDPHY - Dropping from 0.8V...
  8. Zeifurhugen

    820-01700 // Will not startup // U1200 extreme heat

    All diode readings precisely match the good board around the PCH. CPU vcore is stable and present as well.
  9. Zeifurhugen

    820-01700 // Will not startup // U1200 extreme heat

    Hi, I have an 820-01700 that has no visible or accidental damage. The symptoms were that the MacBook got really hot, shut down and will not turn back on. I have inspected the board closely and have been unable to find any damage or short circuits. The when attempting to boot the board, it...
  10. Zeifurhugen

    820-01041 no boot, liquid damage.

    Same result, also not sure if it matters but I have successfully revived many T2's on my main internet connection. Thanks again.
  11. Zeifurhugen

    820-01041 no boot, liquid damage.

    Yea, I tried T2 revive on Catalina and Big Sur, I get the same error 4010. Thanks!
  12. Zeifurhugen

    820-01041 no boot, liquid damage.

    Thank you very much for the response. 3V3_S5 is 1mv - I checked for short to ground and the line has a normal diode reading. Looks like U7800 creates 3V3_S5? 0v9 NAND - 0.9v 1v8 NAND - 1.8v 2v5 NAND - 2.5v
  13. Zeifurhugen

    820-01041 no boot, liquid damage.

    Hi, first time poster, thank you for everything you guys do here. I have 820-01041 that had water spilled through the keyboard. The visible damage/corrosion on the Logic Board was minimal. The only visible damage was located around the CPU/GPU Phase chips (U7220, U7230, QA340).. again very...
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