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Hello everyone, in this lesson we will take a look at the non-triggering faults of the mainboard.

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When we judge that the no trigger fault is caused by the mainboard

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through the replacement method or the minimum system detection method,

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then we will repair the mainboard

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Let's review the symptoms that do not trigger a fault

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No trigger fault means that after pressing the power button,

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the mainboard computer does not respond, the lights do not turn on, and the fan does not turn.

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This is called a failure to trigger

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No trigger failures caused by the mainboard are generally caused by IO or bridges

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These two components are also the core components of the standby circuit and trigger circuit

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Failure to trigger is generally caused by problems with the standby circuit and the trigger circuit

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If we want to understand how to repair the failure without triggering,

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we must first have a complete understanding of the standby circuit and the trigger circuit.

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In the next course, let's take a look at the workflow of the standby circuit and the trigger circuit