These are, more specific, the solders of the power management chip (again). As a result, the welds are also acceptable they crack or come apart over time. Too little solder paste was applied for some welds. This MacBook Pro series, the 2012 15-inch Retina, suffered a manufacturing defect. The only way to get out of this crash is to restart the machine other times, the Mac will restart on its own.Īgain, it is not the GPU involved but a story of soldering on the GPU power supply chips. ![]() You hear the sound of buttons or sound settings. The screen goes black, but the MacBook Pro is still working. The symptoms here are sometimes divergent, but your Mac often displays a black screen, either directly after booting or using the graphics card. This has never been admitted by Apple, and even less taken in the extended warranty. The graphics acceleration part of the MacBook Pro 15 inch Retina 2012 also has a flaw. The series of defective GPUs did not stop in 2011… This is the price to pay to find a functional machine. The backlight of the screen will no longer be adjustable.The graphics performance will be degraded. You will no longer be able to launch a 3D game in the right conditions. This also means degrading the performance of your computer: The only reliable solution we offer is, therefore, to deactivate the secondary GPU. The same for the replacement, the GPU being affected by a manufacturing defect, see the design the replacement only replaces a defective chip with a chip that will soon be defective.ĭisable the GPU, the only reliable solution The passage in the oven is, therefore, only the illusion of a lasting repair. But the break still is and will reappear with time and use. These vias are defective, which, over time but especially with thermal cycles (change from hot to cold and vice versa, repeatedly), first causes these bridges to crack and then give way.īypassing your card in the oven, you allow these vias to take a little volume and, therefore, potentially to partially resolder. Therefore, the problem comes from vias: tiny vertical bridges inside the chip that allow communication between the different stages. ![]() We no longer work on these computers, and we are not the only repairers in this case. Replacing the chip will only lengthen life again, based on a new graphics chip that contains the same defect as the old one. The fault is right with the chip itself and not with the soldering of this chip. The secondary GPU of the 2011 15-inch MacBook Pro was manufactured by Nvidia (the Geforce GT330M). This well-known problem has caused a lot of ink to flow and is doing a lot of harm to Apple, although they were not really responsible. At best, you’ve added heat stress to your chip that will keep it running for a few more weeks. We will start from the start: no, putting your motherboard in the oven does not solve it. … And also the one who gave the weirdest solutions (and disappointed who tried it). Once this famous capacitor has been replaced, the graphics chip of the MacBook passes all GPU stress tests without any problem. But some models have three pads, which makes this component easier, even if it is more extensive, on the pads already present on the motherboard. It will be bigger and will therefore require a little adaptation. It is advisable to replace it with a different technology capacitor (such as an aluminium capacitor). The solution, therefore, consists of replacing this capacitor. The voltage regulation is, therefore, poorly done when the GPU demand is maximum it crashes. It is a tantalum-polymer capacitor that ages poorly and should not be used for these kinds of applications. It is the capacitors that are the problem and, in particular, the C9560. I’ll let you revise the backlight if you don’t follow everything. This circuit works on the same principle: a control chip, a transistor that switches on an inductor and stabilization capacitors. As for the voltage rise necessary for the screen’s backlighting, we have a circuit in charge of the voltage reduction. There is a circuit responsible for producing these different voltages. It is powered at 1.35 or 1.55 V during light loads and should be powered at 1.8 V during heavy loads. The graphics chip needs a low voltage power supply, which varies according to the GPU demand. On these Macs, the problem comes from the instability of the power supply to the graphics chip. Their graphics problem is still too often confused with that of the MacBook Pro 2011, but we will come back to it.Ī problem with the graphics chip power supply They are still usable and used today by many people in office automation or for small daily tasks. ![]() They are generally reliable and robust machines. The mid-2010 MacBook Pro 15 have motherboard number 820-2850. This GPU problem is not coming from the GPU.
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