Appendix
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PPC-1781
12. Appendix
12.1 Troubleshooting and Solutions
Common
Malfunctions
Reasons
Troubleshooting and Solution
No power supply
Please check whether the power
connector is correctly connected. Make
sure the power switch is set to ON.
The device is
not operating
The input power
supply voltage is not
within the voltage
range supported by
the system.
Maybe the system is under
over-voltage or under-voltage
protection, please examine whether the
input voltage is within the allowed
range.
The display has not
been turned on
Turn on the display
The display is under
“power saving” mode
Press any key on the keyboard.
The display input
channel is not
correctly selected.
For the display that has set multiple
input channels, please select the
channel connected to display cable by
the button on the display.
The luminance control
is set to “Black”.
Increase the screen luminance by
luminance control. Please refer to the
instructions of the display for detailed
information.
The external
display is black
Power cable or
display cable is not
connected
Please check whether the power cable
is correctly connected with the display,
the system unit or the ground port.