Protection measures for indoor LCD advertising machine
1. When the device is switched on and off, there are disturbing lines on the screen
Generally speaking, the presentation of this image is formed by the signal disturbance of the display card. It belongs to the normal image, and the user can solve it by actively or manually adjusting the phase.
2. Black spots of thumb size appear on the LCD screen
This appearance is mostly formed by external force kneading. Under the pressure of external force, the polarizer in the liquid crystal panel will deform. This polarizer is like aluminum foil. It will not bounce up after being concave. In this way, there are differences in the reflection of the liquid crystal panel, and some will appear dim. Some of these are simply found under the white screen. Usually, the size is more than ten square millimeters, that is, the size of the thumb. Although this appearance will not affect the service life of the LCD, users should pay more attention and do not press the LCD with their fingers.
3. The LCD advertising machine has no sound
After presenting this question, the user can first open the back cover of the advertising machine, check whether the function on the driving board is powered on with a multimeter, and then check whether the connection of the horn cable is normal. If there is a loud noise from the horn, it indicates that the driving board of the advertising machine is damaged and needs to be replaced immediately.
4. The LCD advertising machine did not respond after plugging in the power supply
There is no response after the LCD advertising machine is plugged in the power supply, which is often a question in practice. In this regard, the user can try to remove the LCD advertising machine, open the back cover of the advertising machine, and check whether the special power supply is powered on, whether the existing material is falling or loose. Specific method: whether the indicator light is on under the condition of 10000 dosage. If it is normal, indicate that the power supply is powered. After clearing the power doubt, the user should successively check the power on status of the decoding board, advertising machine drive board, high-voltage strip, horn and LCD screen. Where there is no electricity, it indicates that the accessories of the advertising machine are in doubt.
5. The LCD advertising machine screen presents a shining appearance
In normal use, the glittering display of LCD advertising machine screen is a question often encountered by users. In this regard, the user should first conduct a sweeping inspection on the external elements such as the magnetic field and power supply voltage around the equipment. If it still cannot be used normally, it is necessary to conduct a comprehensive inspection on the graphics card driver of the display, so as to eliminate the doubt of the program device. After the above operation is invalid, the user can also test the progress refresh rate of 75Hz to check whether it is feasible. If the above operations cannot meet the requirements, the help of professionals is needed. The user needs to send the equipment to the maintenance station for inspection.
6. The screen is black and displays "the signal exceeds the synchronization scale" or "out of Rang"
This appearance is often seen by users in practice. Usually, the signal announced by the computer exceeds the display scale of the display device, and the display device detects that the abnormal signal stops working. In this regard, the user can test and restart the display and reset the output frequency of the computer.
7. The screen does not appear, and the indicator light on the front panel flashes
After this question is presented, the user should check whether the connection between the display and the signal line of the computer is firm, and check whether the socket of the signal line is damaged by pin breakage, twists and turns, etc.