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Hello,everyone

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Let me show you how to repair the wiring disconnection from the solder joints under the chip to other parts of the motherboard during the maintenance of the motherboard

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I got a motherboard now

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As it can be seen from the drawing, among the pins in the row below the chip, there is a pin which is connected to the resistor on the side

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Let's say this board has a heavy fall problem

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After we removed the chip

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It is measured that the corresponding pin has no ground value

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But the measurement from this position of the resistor has a ground value

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That means there is a disconnection from the resistor to the pin of the chip

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Then let's learn how to fix it if this happens

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To fix this disconnection, we must first remove the chip

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Straight-air hot gun

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450 degrees

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Maximum air volume

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After chip removal

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We use a soldering iron to dip a little low melt solder and flatten the solder joint

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Do not apply low melt solder directly to the motherboard

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Add a little flux to the solder joint

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Then we clean it up a bit

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On the drawing, the fourth pin from left to right on the bottom row

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This pin is connected to this resistor

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Assuming that there is a ground value when measuring from this pin of the resistor

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But when measured from this pin,no value

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That means there is a disconnection from this location to this location

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And now we're going to reconnect the line