In recent years, with the continuous expansion of the market of touch products, the all-in-one teaching machine has been widely used in the classroom. The all-in-one teaching machine is developed on the basis of the needs of audio-visual education and computer equipment, and has the functions of teaching, academic exchange report, work conference, demonstration exchange, distance teaching, remote conference and so on.
With the widespread use of all in one teaching machine, there will be some problems with the equipment, which will make us scratch our heads, such as: all in one teaching machine black screen, how to deal with it? Today Old Chen said multimedia teaching machine black screen how to do?
1. Check whether the power supply is properly connected
A black screen may be caused by a power cable being disconnected or improperly connected.First of all, see whether the power indicator light of the teaching machine is on and whether the power supply is available. Secondly, use a multimeter to check whether the external voltage meets the requirements, the voltage is too high or too low may cause the host power supply overvoltage or undervoltage circuit automatic shutdown protection. Third, check the power switch and the connection with the motherboard is correct, because the power switch and reset key often occur to use will be easy to damage, resulting in the whole machine black screen display. If the power supply is damaged, replace the power supply to solve the problem.
2. Check for sound
In the case of no problem with the power supply, the next thing to check is whether the teaching all in one machine still has sound. If there is sound and no picture, it may be that the backlight of the screen is not working. If it can be checked to be the reason for the disconnection of the connection line, then it is ok to plug the connection line in time. If not, it may be the high voltage bar or the main board that is damaged, consider replacing or repairing. Secondly, there is no sound and no image, there is no problem in the power supply and other connections, and the boot can run normally. This time, try to restart the teaching machine, such as the restart or the same situation, at this time you need to contact the business or find a professional person for maintenance. We only need to remember that the power supply connection is correct, sound or silent, in the case of silent no image in check the motherboard, determine the motherboard out of the problem, it is recommended to contact the business directly for after-sales treatment.