DID LCD screen internal troubleshooting phenomenon:
1. No power (black screen): The built-in power supply may be bad or the internal drive board of the machine is not good; Check the method: Check whether the power output is normal. If the power supply is not output, you can confirm that the power supply is bad. If the power output is normal, it may be the driver board. bad.
2. Huaping: In the area of â€‹â€‹the LCD screen, there is no display or display abnormality in a certain area. The troubleshooting method is to check whether the signal transmission line inserted on the LCD screen is loose and causes poor contact. Insert the signal cable tightly and fix it, and check whether the problem is solved; if this is not the case, the LCD screen may be defective.
3. Dark screen (screen without display, splash screen): When the advertisement is displayed, the LCD screen is always in a black screen, dark screen, or splash screen and is called a dark screen. Remedy: Check the power output is normal, such as the power output voltage is not stable (the voltage value does not reach 11 ~ 12v) can confirm the power is bad, if the power output is normal, you need to replace the driver board and inverter, until the troubleshooting.
4. Do not read the card. If the cause of the external fault does not exist, replace the decoder board (integrated board).
5. No signal: No signal appears on the screen when power is on. Remedy: Check whether the internal video cable and the 5V power cable input to the decoder board are loose. If there is no such phenomenon, replace the decoder board or driver board. After the replacement, check whether the fault disappears.
6. After the power is turned on, the screen automatically plays red, green, blue and other pictures, and the exclusion method is: the signal cable is loose or the driving board is defective.
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