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Logic board repair help needed A1229 17"

HI
Sorry it has taken me so long to reply
I have an update
The Macbook pro now turns on for a few seconds, the hard drive spins and fan starts and then off by its self if when I plug in the charger. If only the charger is connected it will not turn on by jumping the pads but when I plug in the battery only the power button works first time press.

I am more confused on whats going on
please can some one help me

Thanks
Waiting for everyones reply
 
Does the screen light up when you try to boot with battery only?
Or, never comes on, no matter what you try?
If the screen does light up, then shuts off as soon as you plug in the charger, then I would guess that you have a faulty DC-in board (the left I/O board that you disconnected earlier.) - or the logic board is simply bad. It may be simpler to replace with a different board than to try fixing the board now.
 
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Hi
Nothing on.the screen
Cannot.find.replacement board
I don't think.it is anything major
I'm.sure with the help from all the talented people on.The forum we can.fix this

How can I do test measurements on.the board If it does not stay on
Can keep power plugged in and battery Theb let it start and.shut down then measure
Please help
Thanks
 
Hi
I am.still adamant to repair the board
I don't think it's major
I just need Some help from talented people who are experts on.component.repair please,
Please
 
i will beat my head against the wall again. i am determined to fix this with help from this forum
please people help me
please
 
You might make a new thread, titled "Need help with component level troubleshooting on MacBook Pro?"
that might get someone's attention.
 
a1229mbp said:
i will beat my head against the wall again. i am determined to fix this with help from this forum
please people help me
please
Click to expand...

At this point, you are approaching insanity. The computer is well beyond its use. take the hard drive out and put it into an enclosure. It's done. /thread
 
a1229mbp said:
i will beat my head against the wall again. i am determined to fix this with help from this forum
please people help me
please
Click to expand...
Repairs at component level on logic boards requires highly skilled electronics engineers with extremely complex expensive equipment, and those labour and equipment costs mean that the mass produced high density computer board repairs are not cost effective.
It's unlikely that any of the regulars here are highly skilled electronics engineers, and even if you find one, he's unlikely to have experience repairing these boards for the above reasons.

You can keep at it, but as others have implied, ........ repeating the same thing expecting different results is ......
 
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Hi
I have been doing some measurements and have found out that u7800 has no power coming in on any pins and nothing coming out
does this mean that i need to replace this or need to replace the diodes before. (can someone confirm which diodes these are, please)

Thanks so much
 
a1229mbp said:
Hi
I have been doing some measurements and have found out that u7800 has no power coming in on any pins and nothing coming out
does this mean that i need to replace this or need to replace the diodes before. (can someone confirm which diodes these are, please)

Thanks so much
Click to expand...
I would have thought that there's no way of making a determination on the condition of the IC if it has no input.

If nothings coming in, how would anything be coming out ?
 
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hi
can some one let me know if this could be a sensor problem such as a resistor please
If so can some one advise where about these sensors are
please
thanks
 
Even Apple's service manual doesn't tell you where the temp sensors are located, except in a general way.
The Service manual lists 13, most are not on the logic board.

I doubt that finding the temp sensors will help you, if you can't get power up long enough to run diagnostics to test them...
I don't think you will get there from here, with that logic board. Time to move on...
 
Not going to give up
If the sensors are not on the logic board Then are they built.into.the processor.
 
I'm just curious why you think that temp or thermal sensors are relevant to your problem.
There are 6 on the logic board. There are 7 other temp sensors that are not on the logic board.
You can find Apple's service manual (if you don't already have it), just do a search for macbook-pro-17.pdf
You should see several sources for the manual.
That manual does list the identification for all the built-in temp sensors, so you can then guess which parts of the hardware have sensors. However, that will not give you locations, only which parts have sensors.
You can see that list in Troubleshooting/Hardware Symptoms/Startup troubleshooting section.
The Take Apart section does show how to get to 3 thermal sensors, and shows where they are. Those are not likely parts that will interest you, either, but you can decide that for yourself, I suppose. They are not mounted on the logic board.
The service manual does NOT show you how to locate the other 10 sensors.
Code: 
don't think that will help you
 
a1229mbp said:
No i am not a troll!
Click to expand...

You say that but your posts suggest otherwise. I'm not trying to be mean but you are not listening to reason. As someone who has been doing Apple repairs for over five years, I am telling you this is most likely not going to happen for many reasons. Firstly, you stated in your original post you suspect a graphics card failure which was a known issue with the A1229 models. The repair extension has long since expired (December 2012). Since Apple has deemed this laptop as obsolete (and rightfully so) this means you cannot get a new logic board from Apple or an Apple Service Provider. Even if you were to go on Ebay to obtain one it will most likely be serialized to a different computer. As far as component replacement, I can tell you right now that you do not possess the skill nor the knowledge to undertake such a repair or you would not be on this forum asking for help. It takes an extreme amount of knowledge and tenacity to do repairs at the component level. They don't even do this at Apple or most Authorized Service Repairs. Even if you were to succeed (for your sake I hope you do) what would be the point? The computer is eight years old and is certain to face complete software abandonment from Apple in the very near future.

SO that being said, why not just reset your expectations to something more reasonable? As I have stated before, you can take your hard drive out of this machine and put it into an enclosure, which will allow you to access the data from another computer. I can help you remove the old drive from the computer as it's not terribly difficult. If for some reason you are using legacy software that requires you to use an older Mac there are PLENTY of 2007 and newer Macs that you can purchase from Ebay or Amazon. Your local Craigslist may even turn up some decent options. Computers do not last forever; they have a certain life expectancy before getting diminishing returns or in this case total failure. The laptop is over 8 years old. It had a good run. It's time to salvage your data and move on. It's time to let go.
 
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