A When the wiring distance between the display screen and the control computer is less than 100 meters, use network cable transmission; when the distance between the two is less than 500 meters and greater than 100 meters, use multi-mode optical fiber; when the distance is greater than 500 meters, use single-mode optical fiber.

A

In two cases, the chip is generally damaged or the chip behind the chip is damaged, causing signal transmission to be blocked. Just replace the chip.<o:p>

A The first is to see if the circuit breaker of the distribution box is turned on, and the second is to see if the video processor and playback box are damaged. The third type: The HDMI, DVI, and DP cables connecting the computer to the video processor and playback box are loose or damaged. (1. Whether it is powered on normally; 2. Whether the signal is transmitted normally; 3. Check whether the control terminal starts normally.)

A Check whether there is a problem with the main network cable of the screen or the HDMI interface of the video processor is loose. If the interface is broken, the device is broken. (Check whether the main signal line output from the main control terminal is loose, and check whether the device interface or the device itself is abnormal;)

A There are two possibilities. The first is that the corresponding chip is broken, or the chip pins are weakly soldered. Another possibility is that the circuit on this board is broken. (1. Caused by false soldering and damage to the corresponding or superior chip; 2. Failure to pass the three-proof protection of the light board, causing the chip or circuit board to become rusty or corroded due to moisture; 3. The corresponding chip line is falsely soldered and open)