Rui Guan

No power supply (black screen): It may be caused by poor built-in power supply or poor driving board; Troubleshooting: Check whether the power output is normal. If there is no power output, it can be confirmed that the power is not good. If the power output is normal, the drive plate may be broken.

As a kind of media publicity electronic equipment, outdoor advertising machine will inevitably have some problems in the process of use. In 2019, ruiguan summarized the common faults and their solutions as follows:

1. Outdoor advertising machine has no power supply (black screen): it may be caused by poor built-in power supply or poor driving board; Troubleshooting: Check whether the power output is normal. If there is no power output, it can be confirmed that the power is not good. If the power output is normal, the drive plate may be broken.

2. Outdoor advertising machine flower screen: a certain area on the LCD screen is not displayed or displayed abnormally, which is called flower screen; Troubleshooting: Check whether the signal transmission line inserted on the LCD screen is loose, resulting in poor contact. If this happens, plug the signal line tightly and check whether the problem is solved; If not, the LCD screen may be defective.

3. Dark screen of outdoor advertising machine (screen without display, flashing screen): When the advertisement is played, the LCD screen is always black, and when it is dark or flashing, it is called dark screen. Troubleshooting: Check whether the power output is normal. If the output voltage of the power supply is unstable (the voltage value does not reach 11~12V), it can be confirmed that the power supply is bad. If the power output is normal, the drive board and inverter need to be replaced one by one until the fault is eliminated.

4. Outdoor advertising machine has no signal: there is no signal on the screen when it is turned on. Troubleshooting: Check whether the internal video cable and the 5V power cord of the input decoder board are loose. If there is no such phenomenon, replace the decoder board or the driver board, and check whether the fault disappears after replacement.