1) When the projected image of the peripheral device connected to the VGA matrix has ghosting, if the projector has ghosting, it is usually not the host. The problem may be that the projector is not properly adjusted and the corresponding buttons of the projector should be adjusted.
2) When the color is missing or no video signal is output, the VGA head may not be connected properly.
3) When the remote control cannot control the VGA matrix.
A. The battery may be dead. Please replace the battery.
B. The remote control may be broken. Please repair it.
4) When the serial port (commonly referred to as the computer serial port) cannot control the VGA matrix, check whether the software serial port corresponds to the serial port of the connected device.
5) If the VGA matrix input and output signals can be switched, but there is no BB call, the internal buzzer of the host may be broken, please send it to a professional for repair.
6) When the VGA matrix is switched, the buzzer sounds but no corresponding projection output.
A. See if there is a signal at the corresponding input terminal. Use an oscilloscope or multimeter to test. If there is no signal input, the input wiring may be broken or the connector may be loose. Replace the wiring.
B. See if there is a signal at the corresponding output. Use an oscilloscope or a multimeter to test. If there is no signal output, the output may be broken or the connector may be loose. Replace the wiring.
C. Neither of the above two cases can be replaced after replacement. The internal failure of the host may be sent to a professional for repair.
7) If the POWER light is off and the LCD shows no operation, the power supply may be abnormal.
8) If the output image is disturbed, the input / output device may not be grounded.
9) The buzzer has a BB called LCD to display that the normal serial port has returned but no image output or audio output.
A. The RCA head may be loose and replaced.
B. The wiring may be shorted and replaced.
C. The internal wires of the wiring may be broken and replaced.
10) When the serial port remote control of the VGA matrix panel buttons cannot be controlled, the internal part of the host may be damaged. Please send it to a professional for repair.