Troubleshooting; Display Problems - NEC FA Series Installation And Maintenance Manual

Troubleshooting

1. Display problems

Problem
Nothing is displayed on
all the LED modules.
Nothing is displayed on
one LED module.
No image is displayed on
one pixel card.
Control (communication)
is not possible.
The colors differ on one
pixel card.
I want to adjust the color
tone of the entire screen.
Bright lines or dark lines
are visible between the
pixel cards or between
the modules.
Check that power is being supplied to the LED modules.
Check that the LED controller is turned on.
Check that a video signal is being input to the LED controller.
Check that a LAN cable is correctly connected between the LED
controller and the LED module.
Check that the brightness is not set to 0% (= not lit).
Check that a LAN cable is correctly connected between the LED
controller and the LED module.
The receiving card inside the LED module may be broken.
→ Check the status of the LED module by following the procedure
in the next section "2 State monitoring using the software".
The power unit inside the LED module may be broken.
→ Check the status of the LED module by following the procedure
in the next section "2 State monitoring using the software".
Check that the contacts of the pixel card are correct (contacts of
the hub board).
The pixel card may be broken. Replace it with a spare pixel card.
Check that the communication cable is correctly connected between
the computer and the LED controller.
Check that the LED controller is turned on.
If the communication cable is a USB cable, check that the device
driver runs correctly.
Perform the "Adjusting the colors on a part of the screen"
procedure. Select the adjustment range using "Select by Pixel
Area" described in (5)-2.
Perform the "Adjusting the colors on a part of the screen"
procedure. Select the adjustment range using "Screen" described in
(5)-1.
Perform the "Line calibration" procedure.
English - 87
Solution