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Hello everyone, in this lesson we will take a look at the principles of troubleshooting

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When we repair electronic equipment, whether it is a computer, mobile phone or other electronic equipment,

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we should follow the order of soft first and then hard, first easy and then difficult,

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and the fault first high and then low

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First soft and then hard refers to the first software and then hardware

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For example, when a blue screen of death occurs,

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we should give priority to troubleshooting the software, that is, the system.

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Check the hardware after excluding the software

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The first easy and then difficult refers to the ease and difficulty of operation.

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For example, replacing the memory and replacing the CPU,

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replacing the memory is much simpler than replacing the CPU

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So when we repair, we should try to replace the memory first, and then try to replace the CPU

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Of course, soft before hard and easy before difficult are not absolute,

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we also need to sort according to the phenomenon and failure rate

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For example, a certain machine has a certain fault that has been repaired many times

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It is obviously caused by the damage of the CPU, the CPU must be replaced first

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Therefore, the repair sequence of faults is not absolute,

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but has a different sequence according to the fault phenomenon and fault type.

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However, in general, the maintenance sequence is soft first and then hard,

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first easy and then difficult, and the fault first is high and then low