Macbook pro a1286 Repair

[Stevemetallium]

Hello, I'm new here and i'm trying to get some help. I'm trying to repar a logic board of a macbook pro a1286 and i'm having some trouble identifiing the 4 blown components on the mobo.
My intention is to resolder new ones, i know how to, but i'm missing on which components are the correct ones i must solder.
Could anyone help me with this?
Thankyou very much

 

[simsaladimbamba]

Can you post a focused photo of the board or the blown parts?

Have you looked at the iFixIt forums for help?

 

[Stevemetallium]

Hello, here are some pics. The area is not cleansed so i can locate where the component is broken.

Thank you for the help.

 

[Mago]

Just avoid sending it to repair to China there are thieves scamming as expert Mac service center, they seized my mbp a1286 logic board

 

[Stevemetallium]

Just avoid sending it to repair to China there are thieves scamming as expert Mac service center, they seized my mbp a1286 logic board

Thanks for your information, but as i said before i'm going to repair it myself

 

[ZZZAC]

Those components probably arnt blown.
looks like gunk or something around them, take a old toothbrush and some isoprpal alcohol (whilst its unplugged from mains and battery) and scrub away.
hopefully it will come right off. theres little chance it will fix the problem, but theres also little chance replacing those capacitors and resistors will fix the problem either.

 

[kreliz]

I can probably tell you what components they are if you give me the LB's serial number and type of MBP.

What happened to the board? Any other signs of damage?

 

[Stevemetallium]

Those components probably arnt blown.
looks like gunk or something around them, take a old toothbrush and some isoprpal alcohol (whilst its unplugged from mains and battery) and scrub away.
hopefully it will come right off. theres little chance it will fix the problem, but theres also little chance replacing those capacitors and resistors will fix the problem either.

Hey, at least one of those components is blown, and probably a capacitor. The mobo has never been damaged by water or any other liquid. It stoped working after an electrical surge.
I've been seeking for the problem a few months ago and i've been unable to find it, and after some time that oxidation apeared so i suposed one capacitor was blown and there goes the problem, i don't know wich one or what component is the one damaged.
I suposed is a short because when i try to plug it on the fan starts and stops and nothing else happens.
All fuses have been tested.
The macbook pro is a 2008 15" a1286 with serial 820-2330-a
Thanks for the help

 

[kreliz]

Hey, at least one of those components is blown, and probably a capacitor. The mobo has never been damaged by water or any other liquid. It stoped working after an electrical surge.
I've been seeking for the problem a few months ago and i've been unable to find it, and after some time that oxidation apeared so i suposed one capacitor was blown and there goes the problem, i don't know wich one or what component is the one damaged.
I suposed is a short because when i try to plug it on the fan starts and stops and nothing else happens.
All fuses have been tested.
The macbook pro is a 2008 15" a1286 with serial 820-2330-a
Thanks for the help

1 = C8806
2 = C8811
3 = R8850
4 = C8813
5 = R8857

 

[Stevemetallium]

Woha, thanks for the info. Where did you get that information? I had in my hands the datasheet of this mobo but never any scheme so i could locate those components.
I'm really thankfull.
Have a nice day!

 

[kreliz]

You need schematics and a boardview. If you know how the files are usually named, they are fairly easy to find. The schematics are often the modelnumber-serialnumber.pdf, and the boardview modelnumber-serialnumber.brd. As they say, Google is your friend. Most of them you find on asian sites.

 

[Astroboy907]

Woha, thanks for the info. Where did you get that information? I had in my hands the datasheet of this mobo but never any scheme so i could locate those components.
I'm really thankfull.
Have a nice day!

I think I have the board view and schematic for this board (heck, I have the computer and pics of the logic board). Send me a PM if you're interested. It'll be a while (4-6 hours?) before I'm back home though.

 

[ZZZAC]

to be fair those components may actualy be shorted or damaged,
Test the resistance across the capacitor, this sounds stupid but if it reads low and not OL then you probably have a short circuit in your gpu power circuit.

 

[Stevemetallium]

Hey, thanks all for the help but i must know this board is pribably going to the trash can XD.
When i was cleansing the oxidation from the components one of them disapeared, with pad included XDD
No presure at all, so it was probably broken from the starting.
Thanks to all and see you soon

 

[madperson]

No backlight + no ext display

Hi guys any help with this one please I'm begging

https://forums.macrumors.com/showthread.php?p=19596055#post19596055

 

[jce138]

I think I have the board view and schematic for this board (heck, I have the computer and pics of the logic board). Send me a PM if you're interested. It'll be a while (4-6 hours?) before I'm back home though.

I know this is an old thread but i am having problems with my A1286 and looking for the Boardview and Schematic. Hope you can help.

Problem is with the faint light on magsafe charger, one wire circuit from what i've read thus far.