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  1. Replies
    14
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    1,221

    Re: 820-4924-A 0.08v on PP3V3_S0

    What is the diode mode reading on pin2 of r5520?
  2. Re: 820-4924 2014 Runs from Bat not main no charge

    Then that's the problem.
    If you have ppbus_g3h and pin26 is not 0v (ground) then it means that the voltage coming in to the buck converter is passing through the internal diode on q7180.....it'll...
  3. Re: 820-4924 2014 Runs from Bat not main no charge

    Ok that's correct.

    Looking back at this post



    You sure you have (or had) 10.85v on pin 26? Don't know how I missed that.
  4. Replies
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    836

    Re: 820 3115 threater lights

    Change the backlight driver.
  5. Thread: 820-3787 dead

    by drichiez
    Replies
    17
    Views
    1,379

    Re: 820-3787 dead

    Touch the memory chips with your lips. You can remove a bunch of caps too. Starting with the 4v ones.
  6. Thread: 820-3787 dead

    by drichiez
    Replies
    17
    Views
    1,379

    Re: 820-3787 dead

    Well that only goes to the ram chips. You'll have to inject 1v there and pray one of the memory chips get hot.
  7. Thread: 820-3787 dead

    by drichiez
    Replies
    17
    Views
    1,379

    Re: 820-3787 dead

    [Only Registered And Activated Users Can See Links]

    STOP INJECTING 12V ON PPBUS_G3H.
    Only inject 1v and go check whether the CPU or GPU is getting hot.
    If the CPU is getting hot remove...
  8. Re: 820 3115 works on battery perfect but not with magsafe

    One of the traces from r7051 or r7052 is not making it to r7050, pins 3 or 4 respectively. Find it and be done with it. People have been telling you where the problem is enough times already :) ...
  9. Replies
    17
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    2,272

    Re: 820-2915-A GPU Mux

    This is a common GPU issue. It's not sending EG_LCD_PWR_EN out.
  10. Re: Schematic for MacBook Pro 15" A1707 820-00281

    Not released yet.
  11. Replies
    865
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    266,413

    Sticky: Re: Apple Service Diagnostic files "ASD" Vault

    Create another account. If still gives you the error. Create another account on a different computer and preferably while connected to the internet via a different (work, school, public...) internet...
  12. Replies
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    2,272

    Re: 820-2915-A GPU Mux

    You could try the swap without reballing anything, only using the residual solder on the logic board and chip. That's how I did a SMC in this video, after 19:00.


    ...
  13. Re: MBA-2012 - 820-3208 - Missing PPVCORE_S0_CPU and PP0V75_S0_DDRVTT - Sanity check?

    I said that because from all the pwrgd signals CPUVCCIOS0_PGOOD was the only one not listed in your post, and if you didn't have all_sys_pwrg that could be the one to blame.

    Everything looks fine...
  14. Re: 820-3437 *takes a long time to boot* slight liquid damage

    Download MRI (Mac resource inspector)

    [Only Registered And Activated Users Can See Links]

    It's on the bitsync share, how come you haven't joint the share?
    Check your PM.
  15. Re: 820-3536 no powering on on not caused by liquid (Green light on)

    On the 820-3115 you can isolate the CPU and its decoupling caps with removing r7520 and r7510. If the short stays on pin2 of each resistor then it should be a shorted CPU.
  16. Re: 820-3536 no powering on on not caused by liquid (Green light on)

    You will ruin the board and chip, if any good, for sure. It's close to impossible to do the job with only a SMT station. Only for reflowing tasks, a much easier job that doesn't apply to the job...
  17. Re: 820-3536 no powering on on not caused by liquid (Green light on)

    Noooo, no offence!
    What machine do you use for BGA chips?



    This board of yours, what is the part number?
  18. Re: 820-3536 no powering on on not caused by liquid (Green light on)

    I haven't tried it but as long as the pin array is the same, it's supposed to work.
  19. Re: 820-3536 no powering on on not caused by liquid (Green light on)

    Shorted MPCH.

    I had the same issue on a very similar board.



    [Only Registered And Activated Users Can See Links]


    Remove R7310 and R7320. Short will stay on PPVCC_S0_CPU rail.
  20. Re: 820-3437 *takes a long time to boot* slight liquid damage

    This is not start up, IT'S BOOT, I'm changing the title.
  21. Replies
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    1,965

    Re: 820-3115-B quarter fan spinning

    Check if you get 1.5v on pin1 of r1125.
  22. Replies
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    2,327

    Re: MBP 820-3115 No Power Green Light (S5 OK? )

    Stop posting anything else before you drive someone crazy :)
    Start over.
    What do you get on pin1 of r1924?
    Pin1 of r1921?
    Pin1 of r1922?
    Pin1 of r1923?
  23. Replies
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    826

    Re: 820-2523-b not turning on light green!

    [Only Registered And Activated Users Can See Links]
  24. Replies
    7
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    826

    Re: 820-2523-b not turning on light green!

    [Only Registered And Activated Users Can See Links]
  25. Replies
    18
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    2,104

    Re: 820-3476-A Fan spins but no chime

    I gave you the voltage drop reading on this pin when you measure in diode mode (red lead on ground/black lead on pin1 of r0860).
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