First of all, without reading the full thing, the first sentence put me off. MacBooks are EXTREMELY sensitive with water. The problem with soda/coffee is that they leave sediments behind, sugar, caffeine... These can short circuit bits on your board. So it can be fixed, but it is a bleak outlook.
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=== Update (05/23/24) ===
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Secondly, of something goes wrong such as shorting USB ports with highly acidic and conductive soda ;) the SMC will trip and no power will flow. Sometimes it doesn't fully cut out the power and does it halfway if the current being drawn or shorted is over the limit but just over the limit.
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However, M1 Macs don't really have an SMC, its kind of built in. What you can try to do is open up the Mac, disconnect the battery from the motherboard, carefully flip the computer over enough to press the power button. It should try to turn on for a second, drawing on the capacitors in the board, and then cut out. This is to fully drain the whole motherboard of any charge left in the capacitors. Leave it for a minute or so. Plug the battery back in, put the Mac together, and boot it up and see if it fixed it.
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If not, come back here and let me know and we will see what we can do.
First of all, without reading the full thing, the first sentence put me off. MacBooks are EXTREMELY sensitive with water. The problem with soda/coffee is that they leave sediments behind, sugar, caffeine... These can short circuit bits on your board. So it can be fixed, but it is a bleak outlook.