What if the video card is not lit after 0d?

What if the video card is not lit after 0d?

1, graphics card 0d not bright

(a) The measurement of chroma video memory A-line waveform, such as waveform, and then the waveform of the crystal, crystal Waveform, the main chip bad crystal no waveform, and then test the crystal two feet voltage, voltage is crystal bad, no voltage is the main chip bad.

(B) such as chroma video memory without waveform, measuring the bios of area A and D, if a zone without waveform, and then the gold finger on the yin value and waveform and voltage, if normal, and then test the bios of the resistance, there will be the main chip bad, the BIOS is also likely to be bad, as the bios of a region has waveform D region without waveform, for the BIOS is bad. There are waveforms in both A and d areas of the BIOS, and the main chip is bad.

2, graphics card plug can not run Windows, the main core version of the bad.

3, video graphics out of the screen with the use of electrical resistance to measure the chroma of the color memory of the ground resistance. In order to judge the line in the case of normal resistance, using an oscilloscope to measure the color of the data at the end of the waveform, two shades of video memory to be measured, that chroma video memory waveform is not normal, for that chroma video memory is bad. If the resistance and waveform are normal, the main chip is bad. Chroma video memory of the voltage and waveform amplitude if not enough, remove chroma video memory, and then test voltage and waveform. If the restore is the chroma of video memory is bad, no recovery is the main chip bad. Two color video memory of the waveform is the same, if there is a good occurrence of anomalies, for that chroma memory bad.

4, the graphics card brightness is very dark to measure the voltage, resistance of light control resistors.

5, the brightness of the graphics card is very bright with the soldering iron again light control capacitor, and then wash the plate washed, such as not yet, the main chip is bad.

6, the graphics card low color bias mainly chip bad.

7, graphics card can not play the main chip 3D game, the speed of individual graphics card memory bad also possible. It is possible to shift the frequency of the crystal oscillator.

8, graphics driver is not installed on the main chip bad. Some data damage to the BIOS is also possible. Errors in the BIOS can also be caused.

9, the line, the field of the first measurement of the resistance, judge the line. Resistance is not normal, line normal, measuring waveform, no waveform of the main chip bad. There is a waveform row field controller bad. VGA head is bad.

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