First, whether the HDMI to VGA power supply is insufficient
In most cases, when using the HDMI to VGA converter, the signal is unstable, intermittent black screen, etc., basically because the interface power supply is insufficient. Each device has different power supply requirements, so when connecting different devices, some may need to be connected to the power supply line while others do not. For example, when a user uses a green HDMI to VGA converter to convert a home device, there is no problem when connecting the TV with a Huawei box before, and the picture is very clear. But later, when connected with a notebook, the signal is not stable, the picture is also intermittent, and it is basically normal after connecting the supply wire.
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In addition to the device itself, the lack of power supply may also be related to the VGA cable connected to the VGA end of the converter. Perhaps very few people will go to detail, here is a simple explanation, there are 3 4, 36, 39 kinds of different pins of VGA cable on the market. 3 N refers to the number of VGA wires (shielding is not included), 3 represents the red, green and blue data lines, and the 4\/6\/9 behind represents the number of wires, the general number of cores can completely replace the number of cores, when we are connected to the VGA converter, the number of cores is less than the number of VGA wires is also more prone to insufficient power supply resolution.
Therefore, the lack of power supply sometimes has a certain relationship with the VGA cable you use, and try to choose a multi-core VGA cable, which can effectively ensure that the device is better connected.
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Second, check the interface and VGA cable
Some people, may be their home device interface aging, or the line (plug) has a problem do not know, but also a strong demand for solutions. When there is a problem, we try to eliminate the most basic equipment itself, which is basic
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Check to see if your TV picture is switched to the HDMI signal source; Check whether your device interfaces are working properly; Check that your cable is not broken; Try to reinsert the cable multiple times.
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Third, see if the resolution of the device is adjusted correctly
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When using HDMI to VGA converters, many people may ignore the problem of resolution. In general, the PS3\/PS4 hdmi output frequency is relatively high, so if there is an uninterrupted black screen after connecting to the TV through the HDMI to VGA converter, and then it will return to normal after a while, it may also be overcouged. Adjust the frequency of the output device to the TV support or lower resolution
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For example, the notebook is 1920*1080, the display is 1280*720, in this case, the adjustment resolution is stable. Remember that the resolution of the HDMI device cannot be higher than that of the display device, otherwise it will cause overclocking, resulting in unstable screen display or other problems that cannot be displayed normally.
Fourth, there is another situation, the computer graphics card driver problem
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Because if the computer graphics card driver is not up-to-date, it is likely to be unable to recognize the signal, or there are various incompatibility problems, including compatibility with HDMI to VGA devices. Updating the graphics card driver is very simple, directly download the driver life or driver Elf these drivers on the Internet, and then automatically detect the update