thread top ad

Collapse

Announcement

Collapse

READ BEFORE REGISTERING SO YOUR ACCOUNT WORKS

In order for your account to be activated INSTANTLY, your PayPal email MUST MATCH THE EMAIL YOU USE TO REGISTER YOUR ACCOUNT ON THIS FORUM!! If your PAYPAL email address differs from your FORUM email address, your account will have to be activated MANUALLY when a customer service agent gets around to it.

I realize this sucks, and I do apologize.
See more
See less

820-00138 turns on, battery error symbol, then turns off. Works fine in SMC bypass

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • 2informaticos
    replied
    Check the board alone on the desk, without any perypheral.
    If works, then start to connect things one by one...

    Leave a comment:


  • JohnB8812
    replied
    The keyboard is resetting the SMC....does it turn on with the keyboard and trackpad disconnected????

    Leave a comment:


  • kevinklinkmuller
    replied
    tried another SMC, dead only charging light comes on. interestingly when i press the power button the light goes from orange to green then back to orange
    gonna check voltages now

    Leave a comment:


  • kevinklinkmuller
    replied
    ok will check soon thanks!

    Leave a comment:


  • 2informaticos
    replied
    SMC is compatible, but you can't be 100% sure got a good one from scrap board...

    Check again basic signals.
    Be sure SMC is properly soldered; check for moved, or knocked off components.

    Leave a comment:


  • kevinklinkmuller
    replied
    Hi there! Revisiting this today. Bought donor board and have reablled SMC from a 820-00138-a board but I noticed the board i'm repairing is 820-00138-05

    have tested that SMC and while I get the orange / green light and while the light turns screen when i try SMC bypass, it's not doing anything more than that

    Will these SMC's work?

    Leave a comment:


  • 2informaticos
    replied
    "I can't find SMC_AVREF"
    PP3V3_S5_AVREF_SMC to be more specific.

    "I guess you're going to tell me now that the programming is different"
    Exactly!!!

    Leave a comment:


  • kevinklinkmuller
    replied
    Actually, it wasn't from the same model donor. the chip has the same markings. I guess you're going to tell me now that the programming is different hahaha

    I can't find SMC_AVREF in the schematic or board view

    Leave a comment:


  • 2informaticos
    replied
    Did you get it from same model donor board?
    Machine should start in SMC bypass, as before.
    Something went wrong in the process, or SMC is bad/incorrect.
    Also check SMC_AVREF voltage.

    Leave a comment:


  • kevinklinkmuller
    replied
    Ok so I did a nice reball on a new SMC and green light is back BUT it doesn't boot in bypass mode.

    faulty SMC?

    Leave a comment:


  • 2informaticos
    replied
    At least at the last point before the "tsunami"
    Or even better, in case if SMC was the culprit; which I doubt...

    Leave a comment:


  • kevinklinkmuller
    replied
    thank you! Going to reball an SMC and put that on next week. that should bring me back to where i started right?

    Leave a comment:


  • 2informaticos
    replied
    Every day can learn a lesson; but sometime can be pricely...
    Next time when you use bench power supply, set it at 3V and go high to nominal voltage after Magsafe is correctly connected.

    Leave a comment:


  • kevinklinkmuller
    replied
    I used a bench power supply. Damn!!!!!

    Leave a comment:


  • 2informaticos
    replied
    I don't think that.
    Something else happened there.
    Unless you used fake charger, which gives full voltage always.
    Original Apple Magsafe 2 gives only 3V at the first moment, before the board is detected correctly.
    Bench power supply also can generate such kind of problem.
    Last edited by 2informaticos; 01-28-2019, 11:08 AM.

    Leave a comment:

thread bottom ad

Collapse
Working...
X