Released June 2012, Model A1278. Intel processor with Turbo Boost, Up to 512 MB DDR5 Video RAM

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Need to re-solder some Resistors & Capacitors - Water damage

Hello, my friend gift me her MacBook Pro mid 2012 13" water damaged.

(Magsafe blinking light - no power on)

I have checked and cleaned the logic board but there are missing the following:

  • R 5369
  • R 5099
  • R 5053
  • R 5076
  • C 4905
  • C 4910

Where can I buy ? How can I understand the value of parts?

Thanks

Update (11/07/2017)

Also missing - ARE THEY REALLY NECESSARY?

  • R 5339
  • R 5349
  • R 5290
  • R 5001
  • R 5024
  • R 5023
  • C 7408
  • C 7414
  • C 7415
  • C 7416
  • C 5520
  • R 5021
  • C 7419
  • C 7418
  • C 1675
  • C 1673
  • C 1674
  • C 1671

How can this system have worked if all those parts are missing?

Answered! View the answer I have this problem too

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Black Friday
Broken doesn't stand a chance.

2 Answers

Chosen Solution

Those parts are there for a reason. You can do without some of those capacitors but you NEED all the resistors! You can get the values on the schematic but it would be better to buy a donor board to steal the components off of. Look for your 820- number but I already know yours is a 820-3115 and get one from china. They are cheap then just steal what you need off the other board. You will need a hot air station and a microscope.

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Thank You so much :)

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Most Helpful Answer

download this schematic https://mega.nz/#!eggVQTSQ!h-bKyiA8hM_ka.... open it with acrobat reader dc and it will let you search for the components and tell you the values

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Thanks for fast reply!

I have booted this Mac two days ago ( in SMC bypass). And it has Booted normally after I had used a new magsafe. But just one normal boot - now I have blinking Magsafe led and no Power.

Is it possible that my MBP model don't need all those missing capacitors?

Thanks

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did you try disconnecting and reconnecting the battery

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yes, also changed Magsafe and DC In Board. Tried any key combination and Smc reset via command line (when I was able to Boot via Smc bypass)...nothing.

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LORIS GIAMMARINO will be eternally grateful.
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