I think many people, like me, often encounter some computer problems and are at a loss. For example, what about the black screen of the computer? So, now the author shares with you some reasons and solutions for computer black screen.
What about the black screen of the computer
1： Display
The black screen caused by the failure of the display to work normally due to its own reasons, such as the problem of the power line of the display, the poor contact of the power plug (Note: it is possible at both ends), the failure of the power switch, the failure of the internal circuit of the display, etc.
2： Signal line
The display used by PC adopts the connection mode of 15 pin D-shaped plug, in which the 13th and 14th pins are line field synchronization signals. The display determines whether to turn on the filament and high-voltage power supply path by judging the presence or absence of these two signals. At the same time, these two signals are used as the transmission signal of display mode through the combination of positive and negative polarity of signals and the difference of line frequency. If one of the line field signals is missing, the power indicator of the display is green, but there is no image display; In case of total shortage, the power indicator of the display is orange and there is no image display. In this case, mainly check whether the D-shaped plug of the display signal line has broken needle, crooked needle or short needle. In addition, there is broken wire inside the signal line. The solution is to replace the high-quality signal line. We have a "video off method" in the power management in the CMOS setting of the computer. There are three options of "V / h sync + blank, blank screen and DPMS". The first one is to select the line signal output by the graphics card to control the energy-saving mode of the display.