The reasons for HDMI hot-plug damage are as follows:
Poor wire quality:
HDMI cables on the market can be described as a mix of fish and dragons, the quality is uneven, and the price ranges from a few yuan to a few hundred yuan. Some consumers think that the connecting line is a small thing, and they don't need to think too much about the quality, so they only pay attention to the price. Poor quality wire may not be well insulated and short circuits are possible. If the joint is not electroplated, it is easy to rust and cause physical damage to the interface. In addition, the conductivity and anti-interference ability of the wire will be relatively low.
Hazards caused by static electricity:
Static electricity can be said to be the invisible killer of all electrical appliances. Since HDMI is a very high-speed digital signal, when designing the sending and receiving chip, the anti-static protection circuit used is generally only resistant to 5-8 kV electrostatic voltage. However, in real life, if the environment is dry, there are also electrostatic voltage Under certain conditions, it is common to generate tens of thousands of volts of electrostatic voltage. In the well-designed source and display ends, some capacitance margins are generally sacrificed to configure ESD protection circuits. However, some machines do not have ESD protection circuits in order to save costs, and may burn the chip when the electrostatically charged HDMI cable is inserted.
In fact, many burnout accidents caused by hot-plug operations are not necessarily HDMI interfaces. We all know that USB supports hot swapping, but we still hear that the motherboard of a certain computer is burned by inserting a USB flash drive, which is probably the problem of the USB flash drive. In addition, the event of burning the VGA interface also happened. Therefore, in order to ensure the normal use of electrical appliances in daily life, in addition to understanding the characteristics of the product itself, the specific analysis of the specific situation also depends on the wire material. It is recommended that you try to buy high-quality HDMI cables with reliable performance.
