dc in board not charging replaced

Question

MacBook Pro 13" Unibody versione metà 2009

Modello versione metà 2009 A1278 - EMC2326 / processore Core 2 Duo 2,26 o 2,53 GHz

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mitchell chelin @mitchellchelin

Rep: 1

Postato: 15 giu 2015

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dc in board not charging replaced

i recently purchased a macbook pro 13 secondhand off of craigslist and has worked fine since

i had a problem with my charger and it threw a spark and burnt the DC in board so i opened it up and correctly removed it and replaced it with another brand new board i had purchased.

I followed the guide on ifixit and have succesffully managed to put it together ect.

it however does not show any sign of charging Nor does the unit the turn on

*battery died due to using it off charge*

i have no lights indacting charging on the magsafe adapter..

all my cables have been checked twice to ensure there connected

is there a reason why i might not be having any luck?

Also my bottom case is off.

Does it need to put on for the charger to activate ?

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mayer @mayer Rep: 685,3k MacHale Enterprises 3,4k 1,1k 2,6k · Answer 1 · 2015-06-22T12:45:44-07:00

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mayer @mayer

Rep: 685,3k

MacHale Enterprises

3,4k

1,1k

2,6k

Postato: 22 giu 2015

Opzioni

First check the output of the magsafe adapter before going to board level repairs. See the pin out on the right side of the page here: https://en.wikipedia.org/wiki/MagSafe

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zzz @zzz30021 Rep: 7,6k zzz 13 22 11 · Answer 2 · 2015-06-21T22:53:40-07:00

1) Find a boardview and a schematic online for 820-2530 logic board. This will allow you to locate components on the motherboard so you can check them. I can't help you with this because it is illegal to distribute Apple schematics and boardviews, but for twenty bucks a bunch of vagabonds in foreign countries will happily oblige(I am not one of them).

2) Measure for voltage on pin 5 of U6901. Black probe of multimeter on a screwhole, red probe on pin 5 of U6901. 3.42v, or something else?

3) Measure for voltage on pin 1 of VR5020. It should be 3.42v.

4) If voltage on in 1 of VR5020 is 3.42v, and voltage on pin 5 of U6901 is not 3.42v, then run jumper wire from pin 1 of VR5020 to pin 5 of U6901.

This will help you gain some understanding.

https://www.youtube.com/watch?v=FLH2Ns7Z...

https://www.youtube.com/watch?v=sI7rvFLU...

Ultimately if this requires anything more than running a wire between those points it is kinda junk for the purposes of reviving a six and a half year old machine. You can find boards on eBay for $177 and free shipping for this. If you really want to go down learning board repair to fix a core 2 duo I will happily follow up here, but I don't believe it is worth the time or effort for a machine that came out before I could legally buy beer.