I do see an "L" prefix, but not sure what that corresponds to. Is there sub-variants of this board? What are tricks to "orient" or identify components that might be tricky to find on the board vs board view? Are the prefix letters indicative of the component type? (c= capacitor, r = resistor, I = inductor, U = chip, J = connector, etc). So I'm having a hard time identifying components exactly to know if I'm getting a proper ID of components. I see corrosion around the L7660 area it seems (lower left of the board with the orientation it came out of the machine with the fans up at the top), to the left (close to C6566) on the board view, but there's also a connecter here (my best guess is J6500), that doesn't show up on the board view. On the board view, I tried finding and noting areas of water damage and understanding the circuits impacted, but the board view doesn't line up exactly with the board. What can be done to use a usbc amp-meter to current limit to ensure the board won't short and push a bunch of amps to a valuable chip? I do have a bench current limiting power supply, so i know i can inject voltage and bypass the usage of the amp-meter, just curious on thoughts.ģ. What's the first steps to verify the CPU, gpu, ssd, t2, etc aren't going to be damaged if I connect this board to power? I know i should look for obv shorts, but what about verifying that power regulation systems for these won't generate too much voltage? Do I "isolate" these systems by removing caps / chips to ensure any generated voltage won't go to the chips in question and then add back the chips/components once they are checked?Ģ. I know i'll likely apply conformal coating to this area/other areas for future durability if I fix the board.ġ. I will likely need to verify this however. I do not see damage to the LCD connecter, so no 50v should be sent to the cpu / cpu mux. I have removed the covers on top of these chips, and do not see corrosion near / on these chips. I know i'll likely need to source a donor board (i know that can be tricky to source, but i'll worry about that a bit later), but the first part is identifying the damaged components, organizing them / their location on the patient board and ensuring the board doesn't have an "unfixible" component (cpu, ram, ssd, gpu, t2, etc). I have the board out of the machine, and have organized the screws based on location they came out of and other covers / pieces. I have decent understanding of electronics and the like (I have watched a bunch of videos of repairs, as well as am a professional programmer as my career).
I have the necessary tools I've amassed over time, but want to begin. I currently bought a broken macbook (A2141), that was water damaged, and want to repair it.
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