Digital signage LCD advertising machine has gradually entered the ranks of the “arcade”. As most users do not have professional application and maintenance knowledge, in the face of some daily problems often helpless, can only hope that the professional maintenance personnel, resulting in a waste of time and money. Based on the application of the efficiency point of view, the user to master some of the basic application maintenance skills is very necessary. In this paper, some common problems and solutions are summarised in order to help you.
1.LCD advertising machine plugged into the power supply after no response
LCD advertising machine plugged into the power supply does not respond to the actual application of a problem that often occurs. In this regard, users can try to remove the advertising machine, open the back cover of the advertising machine, check whether the special power supply is energised, whether the present material is off or loose. Specific method: use the amount of universal indicator light is bright, if normal, it shows that the power supply is electric. Excluding the power supply problem, the user should check in turn on the decoder board, advertising machine driver board, high voltage bar, speaker, LCD screen power situation. Where not electrified means that the advertising machine where the accessories have problems.
2. LCD advertising machine screen flicker phenomenon
In the daily application, LCD advertising machine screen flicker is often encountered by users. In this regard, the user should first of all equipment around the magnetic field, power supply voltage and other external factors to exclude the check, if still can not be applied normally, we must monitor the graphics card driver to carry out a comprehensive check, to exclude the installation of the programme. After the above operation is invalid, the user can also try to increase the refresh rate of 75HZ, to see if it is feasible. If the above operations are unable to achieve satisfactory results, you need professional assistance, the user needs to send the device to the repair station to check.
3.the screen black screen and display “signal out of sync range” or “OUT OF RANG”.
This phenomenon is often seen in the practical application of the user’s tricky problem, generally the signal from the computer out of the display range of the monitor, the monitor detects abnormal signals to stop working caused by. In this regard, users can try to restart the monitor, and the output frequency of the computer to reset.
4.the screen does not display, the front panel lights flashing
After the emergence of this problem, users should check the monitor and the computer signal line connection is firm, and check whether the signal line socket pin broken, bent and other damage.
5.equipment for the switch, the screen appeared on the interference pattern
Generally speaking, this phenomenon is caused by the display card signal interference, is a normal phenomenon, the user can automatically or manually adjust the phase to solve.
6. the LCD screen appeared on the thumb-sized black spots
This phenomenon is mostly caused by external pressure. Under the pressure of external forces in the LCD panel in the polarizer will be deformed, the polarizer nature like aluminium foil, was pressed into the concave will not pop up, which caused the LCD panel in the reflection of differences, there will be a grey part of the screen, this part of the white screen is very easy to find, the general size of more than a dozen millimeters squared, that is, the size of a thumb. Although this phenomenon will not affect the service life of the LCD screen, but the user should pay more attention, do not press the LCD screen with your fingers.
7. LCD advertising machine no sound
After the emergence of this problem, the user can first open the back cover of the advertising machine, use a multimeter to check whether the efficacy of the driver board is energised, and then check whether the connection of the speaker line is normal. If the speaker murmur is very large it shows that the advertising machine driver board has been damaged, to be replaced immediately.
