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In this lesson, let's take a look at the troubleshooting process of running score black screen

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The black screen of the running score means that the graphics card can be turned on normally,

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and the driver can be run normally, but the black screen restarts after running the score

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Most of the failures like this are caused by power supply,

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and only a small number are caused by GPU or video memory.

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Let's first talk about why the power supply will cause the black screen of the running score

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When the graphics card is normally lightly loaded, it may only have 10 watts of power supply,

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and its input voltage is still 12 volts.

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But when the graphics card starts to run, it can go from 10 watts to full load in an instant

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100+ watts at full load

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This speed is very fast, less than a second

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While the graphics card can go from no load to full load in less than a second, the power supply is not as responsive

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This causes the graphics card to require a lot of electricity,

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but the power supply cannot be provided immediately.

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The power supply will be pulled down

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When the power supply is pulled down, the graphics card restarts with a black screen

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Is there any way to make it not pull down?

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We can use capacitor

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Because the capacitor can store energy,

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and the response speed of the capacitor is much faster than that of the power supply.

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When the graphics card needs a lot of power, the power supply can't respond,

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then the capacitor can release the electric energy stored by itself first.

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Wait for the power supply to respond before charging the capacitor

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When the capacitor fails, the charge stored in the capacitor is not so much,

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and it cannot meet the needs of the graphics card.

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The power supply will be pulled down, and the graphics card will restart with a black screen.

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Therefore, most of the running score black screen faults are caused by capacitors.

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The common faulty capacitors generally have three positions, the 12-volt filter capacitor,

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the filter capacitor for the core power supply,

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and the filter capacitor for the memory power supply

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There is a problem with the filter capacitors on the three power supplies,

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which may cause a black screen failure in the running score.

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Next, let's take a look at the troubleshooting process

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First we need to observe the appearance of the graphics card

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If the graphics card has an appearance fault, such as a bulging capacitor,

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then you don't need to test it, just replace the capacitor directly.

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After checking the appearance, we need to use an oscilloscope to measure

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whether the core power supply and the memory power supply are working

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Because the core power supply and memory power supply are both multi-channel power supply

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Suppose they originally had three power supplies,

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but two of them stopped working due to a fault, and the other one worked normally.

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This way can make the graphics card boot up and display normally,

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but it can't drive it to run the score

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A black screen restarts as soon as the running score fails

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Therefore, if one or two channels of the core power supply or memory power supply do not work,

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it will also cause a black screen in the running score.

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After confirming that all the power supplies are working normally, we try to supply power to the core,

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power supply to the video memory and the filter capacitor behind the 12 volt power supply and test the capacitance

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Parallel capacitance will increase the capacitance of the capacitor

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If the capacitor ages and the capacitance drops,

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we can increase its capacitance by paralleling the capacitor to determine whether the fault disappears

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If the fault disappears, just replace the capacitor

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After the above steps, if it has not been repaired,

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we can use a small plane to lower the frequency of GPU and memory to test

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If the fault disappears after the frequency is lowered,

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it means that the GPU or video memory is damaged

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This step is because the running score black screen failure may be caused by GPU aging or memory aging

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After the GPU and memory are aged, they can work normally at low frequency,

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but they can't work normally at high frequency

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We use the overclocking software of the small plane to try to lower their highest frequency

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If the highest frequency is lowered and they can work stably,

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it means that the running score black screen is really caused by GPU or memory aging.

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Just replace the GPU or memory

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This is the troubleshooting process for running score black screen