Recent content by sangolossyfon

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    820-3115-B board only works on SMC bypass mode

    unfortunately the board did stop working when I tested it again. It kind of tries to boot and spins the fan then stops then tries again. In SMC bypass mode it sometimes gets to a full boot and I hear the chime, but then it dies again. I have never gotten it to show anything on the display either...
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    820-3115-B board only works on SMC bypass mode

    I verified every voltage and resistance, and also checked that resistance to ground on the PBUS and DCIN lines were the same as working board. Is it possible that this is just bad SMC or bad connections below SMC? All the other components are fine. EDIT: reflowed SMC- board now boots and draws...
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    820-3115-B board only works on SMC bypass mode

    PBUS_VSENSE and DCIN lines had same resistance to ground as good board still 1.46v and 2.11v on the two lines even with capacitors removed r5489, 5488, and r5499/98 all are correct values on broken board
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    820-3115-B board only works on SMC bypass mode

    resistors had no sign of damage below I am posting first broken board voltage in SMC bypass mode, versus working board voltage for comparison Q5480 PBUSVSENS_EN_L- 0v(broken) vs 0v(working) PBUSVSENS_EN_L_DIV- 6.09v vs 6.25v PPBUS_G3H- 12.26v vs 12.55v PM_SLP_S3_R_L- 3.3v vs 3.3v...
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    820-3115-B board only works on SMC bypass mode

    regular mode, plugged in SMC bypass mode Working Board CPU_ISENSE 0v 0v 0.10v DCIN_ISENSE 0.04v 0.04v 0.33v HDD_ISENSE 0v 0.01v 0v BMON_ISENSE 0v 0v 0.06v CPU_HI_ISENSE 0.07v 0.01v 0.12v OTHER_HI_ISENSE 0.08v 0.02v 0.09v MEM_ISENSE 0v 0v 2.64v CPUVCCIO_ISENSE 0v 0v 0v...
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    820-3115-B No Power

    The board now turns on consistently after I pushed down a little on R1802, probably some damage to the PCH_SRTCRST_L line in that area. the voltage on that line is still 3.3v. SO I guess it's working...
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    820-3115-B No Power

    like I said in my final edit PCH_SRTCRST_L was 3.3v and I did end up replacing C1802, but I will check the trace, could I be getting 3.3v if it wasn't connected to PCH?
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    820-3023 no boot/fan spins

    I did replace it and it does the same thing. SMC is beyond my skill at the moment so I am going to just use this board as a desktop mac/always plugged in. but thank you for the help.
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    820-3330-B No Boot Warm GPU

    C6703 WAS LOOSE- and had ripped a pad BOARD BOOTS after replacing it! thank you so much for the help! this is a great save!
  10. S

    820-3115-B No Power

    0.4v on SYSCLK_SYS32K_RTC 3.3v on RTC_RESET_L edit: BOARD JUST TURNED ON when i checked voltage on PCH_SRTCRST_L drawing 14 watts... PCH_SRTCRST voltage was slowly dropping starting around 2v when I checked it. Seems to go up to around 1.5v then back down slowly, then spikes up... edit- C1802...
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    820-3115-B board only works on SMC bypass mode

    regular mode, plugged in SMC bypass mode CPU_ISENSE 0v 0v DCIN_ISENSE 0.04v 0.04v HDD_ISENSE 0v 0.01v BMON_ISENSE 0v 0v CPU_HI_ISENSE 0.07v 0.01v OTHER_HI_ISENSE 0.08v 0.02v MEM_ISENSE 0v 0v CPUVCCIO_ISENSE 0v 0v AXG_ISENSE 0v 0v CPU_VSENSE 0v 0v DCIN_VSENSE 0v 2.08v...
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    820-3330-B No Boot Warm GPU

    diode mode to ground on both sides of L7630 is 009 which is identical to working board. 13 5v 14 5v 3 3.3v
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    820-3023 no boot/fan spins

    are you sure it couldn't just be an issue with U7000- as the line that had a high voltage through it also goes to U7000?
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    820-3023 no boot/fan spins

    550 on the BCA_SCL- this was the one shorted to PPVBAT_G3H_CONN 520 on the BSA_SDA
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    820-3115-B No Power

    PM_RSMRST_L stays high even when power button shorted but no pulse in PM_SLP_S4_L
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