1. The all-in-one cannot be turned on. First confirm whether the power supply of the all-in-one is normal, and then confirm whether there is feedback of the central control signal when the Dingyi machine is turned on. If there is feedback, please confirm whether the power supply and startup signal of the all-in-one PC are normal. 2. The all-in-one cannot control the projector. Check if the projector model and projector control commands and RS232 control line and connection method are correct. 3. The one machine has no sound. Please confirm whether the audio output of the teaching machine is normal. If it is normal, it can be judged that the power amplifier module is abnormal. If the audio output of the all-in-one is abnormal, please confirm which part of the wireless Bluetooth module and computer audio playback is abnormal, and then solve the problem for the abnormal parts. 4. Touch cannot be operated. First confirm that the display of the all-in-one display is normal, and then confirm whether the operation panel is unlocked. If it is normal, it may be caused by repeated operation, causing the all-in-one touch panel to crash. Disconnect the power and re-power it to solve the fault. 5. The computer displays a blue screen. Please confirm whether the computer system crashes due to a virus in the computer operating system. If yes, reinstall the computer operating system to solve the problem. If the computer operating system is normal, determine whether the memory is damaged due to the damage of the teaching machine. 6. The all-in-one display color is abnormal. Please replace the VGA output interface and VGA cable to eliminate abnormal faults.
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