3) After the above two conditions are replaced, it still not
work. The internal unit may be faulty. Please send it to a
professional for repair.
6. If the LCD has no display, the operation does not respond,
may be power supply’ abnormal.
7. When connecting the connector, if the static electricity come
to be strong, the power ground wire may not be connected
to the ground. Please connect it properly, otherwise it will
easily damage the host and shorten the life of the host.
8. When the matrix panel buttons, serial port and remote control
cannot be controlled, the internal host may be damaged.
Please send it to a professional for repair.