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Hello everyone, in this lesson, let's take a look at the troubleshooting process that does not display faults

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Fault not displayed means that the host has been turned on, but there is no display on the screen

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We can judge whether the computer is turned on by whether the keyboard case can be switched.

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If it can be switched, it means that it has been turned on.

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And this kind of boot does not display a fault may be caused by the card not being recognized

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or the problem of the GPU memory, or the problem of the interface circuit.

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These types of faults have different repair procedures

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So we first need to make a general positioning of the fault

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How to locate it?

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We need to use integrated display to start

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After using the integrated display, the screen will light up.

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Let's enter the system to see if the graphics card can be recognized.

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Observe whether the graphics card is observed through the device manager

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If the graphics card is recognized, there will be a graphics card device in the device manager.

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Regardless of whether the device works normally or whether there is an exclamation mark,

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if the graphics card cannot be recognized, it means that its fault is that the card is not recognized

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We will repair it according to the troubleshooting idea of not recognizing the card

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If the graphics card is recognized, it means that its basic working conditions have been met,

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and we need to further locate the fault

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If the recognition card is not displayed like this,

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we must first try to install the driver for the graphics card in the system to see if the driver can be installed,

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and whether an error is reported after the installation

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If everything is normal after the driver is installed, and after restarting, the driver does not drop,

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and there is no exclamation mark, then the graphics card is generally no problem

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No display failure caused by the interface circuit, we can try to plug in another display interface

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Because generally not all interfaces are damaged at the same time

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If an error is reported after installing the driver,

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it means that there is indeed a problem with the graphics card.

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Like this kind of failure, we must first test the video memory to see if there is a problem with the video memory

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There is no problem with the video memory,

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let's remove the card and measure whether the power supply of the whole board is normal

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After confirming that there is no problem with the power supply, you can only do GPU

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This is the troubleshooting process that does not show a fault