The heart and the pits i used to tear down
Hey, again, i wanted to talk to you today about the apple master board, and to be honest, every time i lift up macbook's cover, and see the delicate and fragile circuit board, i always have a feeling of piety in front of a sophisticated watchmaker. More often in the face of the pressure of a client's expectations, it's not as simple as a screw。
"enter water? It's okay. It's working
Last summer, the old man ran into the store with his macbook pro, saying he accidentally spilled half a cup of coffee. "i'm dry! I've been dry all night, i can turn it on in the morning!" he's got some luck in his tone. I'm gonna open it up and i'm gonna start thinking: the molasses of slime under the keyboard are crawling slowly along the edge of the main plate, like a greedy snake, coffee? It's like the main plate's "sculpable bone water" -- sugar + moisture + electrolyte, and it's like three corrosive sets。
"was it okay to fall?" life
The beautiful air slipped from a half-metre-high desk, with a shallow scratch on the shell. "you see, it's all right!" she's optimistic, but ten minutes after running the big software, the screen is suddenly black and it's no longer lighted, and the breaker tests show that there's an incognito micro-deformation (bend) on the main plate when it falls, which results in a slight crack that is not visible to the naked eye of a key bga chip (such as cpu or gpu)。
"why doesn't it suddenly charge?" -- "strike" for power management
An old macbook pro, whose users complain that batteries are inoperable, that plug-in power is functional, but that they are pulled off in seconds to detect the health of the batteries themselves, points to the core of charge and power distribution on the main plate, the power management chip (pmic) and its surrounding circuits。
"the fan turns, burns the eggs!" -- the break of the dispersing chain
A video-cut macbook pro 16 inches complains about fan take-off like a plane, burning hands in the keyboard area, limited improvement after ash-to-sillilip, in-depth examination, and problems with temperature sensors on the main plate or their associated circuits。
"i can't turn it on? Don't panic. Maybe it's just "i'm hungry."
It's written at the end: awe and awareness
Apple master plate repair, like a few degrees in the microworld, with a hot wind gun at a temperature differential, and a shivering swirling hand, may have declared a master plate of “death penalty” with screwdrivers, steel heads, microscopes, watchbooks, and a bunch of scraps removed as souvenirs — they remind me of the boundaries of technology。
To be honest, not all faults are worth repair, not all the “theologians” are able to return to the spring, facing a plate that is heavily corroded by water, with many of the bga chips welded, or that has been repaired by a “two knives”, sometimes urging users to give up, but rather the most responsible choice, with the apple master plate becoming more integrated and encrypted (the unified memory of the t2 chip, the m series), and the space for personal maintenance being reduced。
If you love your apple computer, the best “maintenance” is prevention: far away from liquids, with light, with battery, with coolness, with the main board suspected of failure, with back-up data (remember!) and then with a reliable teacher willing to talk to you about risks and possibilities, with maintenance, and, in many cases, with a trade-off between cost, time and probability of success, with every miracle, but the small achievement of finding a trail of failure in a delicate world and occasionally lighting the screen is probably the most fascinating place。
