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Heat makes it evaporate quicker when put on shorted parts that are very hot. Use isopropyl alcohol to locate overheating components.Mostly the 2 primary ones after the charging port, they are very encline to shorts due to their constant solicitations.
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There are around a dozen, a lot of computers breakdowns come from a short circuit in a transistor. These components are the power supplies of each part of the board, if one power rail is down then it can prevent the laptop from working.
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Does your laptop have any issue with the disply, or the power? Start with the basics by measuring the voltage at all the measuring points showed in the repair guide, and come back with all the measures so we can help you fix your HP i ec HP. Depending on the problem it won't be the same approach. Don't jump into the repair book and chip level right away.