Daktronics 4000 Series Digital Billboard - Manual (Page 20)

14 R emoving Modules from the Dis play
3.7 S elf Tes t a Module
1. If a module is blank and it has power supplied to it, you can connect it for a self-test.
Attach a working SATA cable to Ports A and B, power cycle the module to run the self-
test.
2. Observe the module test. The module should play red,
green, blue, white, and then a double-digit number. It
will continue to cycle through this pattern until you
stop it either by disconnecting power or the SATA
cable.
3. If the module does not display this pattern, check the
power indicator lights to verify it is receiving the
proper power (12 volts). If the power is correct, try a
known SATA cable to be sure, it is not a SATA cable
problem. If the problem persists, replace the module.
Figure 18: Self Test