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Hello everyone, in this lesson we will take a look at the solutions to common desktop failures,

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of course at the board level

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The first is to not trigger a fault

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Most of the faults that do not trigger are caused by the mainboard,

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but it can also be caused by the power supply

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Therefore, when a failure is not triggered,

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you can directly use the replacement method to replace the mainboard or power supply

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Of course, we can also test it with the minimum system method first.

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What if it's okay?

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Next, let's look at the fault of not running the code

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There are many reasons for non-running code failure, and the common ones are mainboard, power supply and CPU

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We can use the replacement method to replace the CPU, power supply and mainboard to test

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Next, the power-on power-down fault

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The scope of this fault is relatively wide

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Any problem with any component on the mainboard may cause power-on and power-off failures

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So we can only use the minimum system method and the replacement method to test one by one

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Determine which component caused the fault

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Blocking code failure

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The block code failure is similar to the failure of power-on and power-off.

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Most of the components in the computer may cause this failure.

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But it has a failure rate

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Under normal circumstances, the highest failure rate is memory oxidation.

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We unplug the memory, wipe the golden finger with an eraser, and then put it back

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This can solve a large part of the block code failure

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If it still doesn't work after we plug and unplug the memory to clean the golden finger,

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we need to use the minimum system method and replacement method to find the faulty part

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Next, no display fault

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Here I would like to reiterate to everyone that the fault phenomenon is that

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the upper and lower case lights on the keyboard can be switched, but the screen is not on.

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This failure may be caused by the mainboard, CPU or graphics card.

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If there is a graphics card, then we should first exclude the graphics card

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Because the graphics card has a relatively high failure rate among the three,

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and it is also the easiest to replace.

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So let's replace the graphics card first

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If it still doesn't work after replacing the graphics card, we replace the CPU and mainboard in turn

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Let's take a look at some troubleshooting methods after starting up

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The first block LOGO failure

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It is usually caused by peripherals or mainboard

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There is a component with a very high failure rate, and that is the hard drive

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Therefore, when encountering a block LOGO failure, we should first replace the hard disk and test

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If the fault disappears after replacing the hard disk,

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it means that the hard disk is really damaged.

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If it still doesn't work after replacing the hard disk,

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we need to use the minimum system method and the replacement method

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to replace them one by one to see which part is causing the problem.

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Next no boot failure

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In most cases, this failure is caused by software, that is, caused by the BIOS or the system.

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When encountering a failure to boot, we should first check the startup items of the BIOS,

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and then check whether the system is normal

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Or we directly replace a hard disk with a system, and test to see if we can enter the system

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Blue screen of death

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It has a wide range of faults, and most of the components in the computer may cause this fault.

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But the higher failure rate is the system

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For example, the client's computer is poisoned, or some strange software is installed,

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which may cause frequent blue screens of death

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When encountering a blue screen of death failure, you should first troubleshoot the system

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After excluding the system, we will judge whether the hardware is normal

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Finally, a functional failure

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There are many, many functional failures

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Any one function has the potential to produce a functional failure

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We will judge according to the fault phenomenon.

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For example, no sound failure

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It may be caused by the system or mainboard

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We follow the rule of soft first and then hard, first replace the system, and then replace the mainboard

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These are the solutions to common desktop problems

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After studying this lesson, we can basically perform board-level maintenance