The NVidia Graphics Chip Present On The Logic Board Is To Repair / Replace.
Black Screen On MacBook Pro
E ‘need to make a reballing / reflow with professional equipment.
In this article I show how I do a repair on the A1229 model but the solution is applicable to other models with processor nVidia.
TNell’articolo, despite having the experience and equipment to perform a reball balls of tin, I limit myself to only reflow that on this model I consider quite effective and generates a riparzione reliable and durable.
In my case, when pressing power:
The LED lights up front but I have no sign of life on video. Not even the initial dong (chime) typical of the Mac.
We start the phase of unmounting MacBook pro. In this case, issue of the model 17 “.
We begin to work on the bottom of the PC, placing on a soft surface and clean.
Detach the battery and begin to see where they are positioned all screws. In practice they are all on the bottom and side edges 3, except for the front side (where there is the button for the opening of the screen) where there are no screws.
We start to have fun .. svitiamo all screws, possibly placing them on the table in an orderly manner so as to put them back in place during reassembly.
We remove the cover that hides the RAM and dismantle these. Note the extreme cleanliness and design of each individual component … even the screws, flat ones, the year a spectacular design ..
Now it’s up to the side screws …
Okkio to unscrew the screws hidden … these three, in vain, being a little oblique I’d jump …
These are screws of the body, found only outside the chassis:
Now we can begin to gently lift the upper body, making sure the flat keyboard that is connected to the motherboard or as he calls Apple Logic Board.
Stacchiamolo gently but decision.
And here we are finally in front of the main board of the MacBook Pro.
Now comes the most delicate phase: we must dismantle every flat, cable and connector connected to the motherboard, namely the central body.
Detach the flat of the video, the flat of the burner, the present flat on the left (top hard drive). Then we have to remove the burner itself (3 screws), remove the WiFi card placed in the head hard disk, all the pins and flat present below this.
Let us keep in mind as they are positioned all around the flat and that they do because after we put everything in the same position ..
Also you notice the small pins blacks, such as those of the fans: have connectivity unusual, come off very gently pulling pratcamente UPWARD.
After removing all the flat and connectors this is pretty much one of the last which holds the motherboard to the rest of the components.
Eye to detach it takes a little bit because the cable is quite rigid.
Finalment get to the point of being able to lift the motherboard ..
And here are the 3 processors on display. Of the three, the nVidia graphics chip is the first on the left.
The first thing to do is to be cleaned, removing the old thermal paste.
Subsequently control that on the underside processors there is something that can burn, in contact with the plate of preheat.
In this case there are only removed from the thicknesses in the sponge.
Attack with Kapton thermocouple sensor (or sensors if I want to do the work on the chipset) on the bottom of the motherboard, the processor at nVidia, so as to control the temperature during reflow.
At this point we can proceed with the various procedures, if we want to completely detach the processor with nVidia reballing, complete replacement or reflow.
In the case of reflow we can proceed with the work on only nVidia or processor and nVidia chipset (bga station).
Before starting any type of work we have to eliminate during preheat the silicone glue on the edges of the processor on which we want to work. Later – but not required – we can applicarne new. Then it’s up to the flux.
In case of reflow, with the help of a syringe, after preheated, push the flux beneath the processor. Provider and then perform reflow respecting the temperature curves indicated by the manufacturer for this processor.
After finishing the work, look forward to the cooling plate and provider and cleaning by removing the excess flux and cleaning the sinks from the old thermal paste. To remove traces of flux can use alcohol or spray specially designed for this purpose.
Next step, the application of thermal paste. I put a little bit more as the old pasta was pretty dense. For this I used the Mac pasta Artic.
A little trick: In this case I apply the thermal paste on the heatsinks is that processor; skald also some pasta and do cool several minutes before replacing the motherboard. This operation allows to amalgamate the best this kind of pasta.
After doing this I just have to close it according to the backhand passsi followed for removing the motherboard.
Eventually remount the battery and try to turn it on … and the result is positive!
The MacBook Pro That Had Problems Before Video Was Repaired !!