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In this lesson, we will talk about how to repair the short circuit of CPU and the temporary storage power supply

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When there is a short circuit in the power supply line of the temporary storage and CPU,

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there is no water ingress and corrosion, how do we repair it?

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First of all, we turn the multimeter to the diode gear

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to measure the capacitor around the power supply

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We measure the ground value on the capacitor

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Find the specific power supply that has a short circuit to ground

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When we find the circuit, what should we do?

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We can use the burn-in method to quickly find the component on the circuit

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Let's take a look

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First, use a DC power supply to output a voltage of about 1V

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Do not open the protection at the current position

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This is the power cord, with positive, negative, and alligator clips

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The clip of the negative pole should be clamped on the shield of the mainboard

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The shield is the negative pole of the battery, and they are connected

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Solder a wire to the circuit,

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the other end of this wire, we clamp it with the positive clip to see where the heat is

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Smoke rosin, then clip it on

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The negative clip is grounded,

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and the positive clip is used to clamp this wire

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At this time,

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the short-circuited components will melt the rosin we smoked on the surface

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We find the faulty component by looking at the location of the melted rosin

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The maintenance of CPU, temporary storage, and its power supply short circuit,

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including the power supply short circuit of the hard disk,

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the maintenance method is the same

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Let's take a look at how the burn-in method works

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We smoke the surface of the components connected to the power supply line with rosin,

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It is the power chip on the line,

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the rosin is smoked on the capacitor,

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In addition, we also smoke the surface and surrounding of the CPU with rosin

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After the rosin is smoked, we provide a power supply to the line

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We adjust the voltage to 1 volt, a safe voltage

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Then, we find a wire, solder one end to the short circuit,

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connect the other end to the red clip,

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and connect the black clip to ground

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Then we see where on the line the rosin melts

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Okay, that's all for this lesson