Technical data

Overview and Updates
NI LED Codes
The NI LED codes represent continued power-on and extended self-test testing. If an error
occurs during this testing sequence, then a hexadecimal code appears with FRU and error
code information on the monitor screen.
If the system does not enter console mode (>>>) or if hex code DD is not displayed on the
LEDs, then use Tables 1-10 and 1-11 to isolate the failed FRU.
Table 1-10 NI LED Codes
LED Display Hex Code Solution 1 Solution 2
o•o•oooo
50 1 2
o•o•ooo•
51 1 2
o•o•oo•o
52 1 2
o•o•oo••
53 1 2
o•o•o•oo
54 1 2
o•o•o•o•
55 1 2
o•o•o••o
56 1 2
o•o•o•••
57 1 2
o•o••ooo
58 1 2
o•o••oo•
59 1 2
o•o••o•o
5A 1 2
o•o••o••
5B 1 2
o•o•••oo
5C 1 2
o•o•••o•
5D 1 2
o•o••••o
5E 1 2
o••o••••••••••
5F None: All Tests
Passed
Table 1-11 NI LED Codes Action Table
Step Action
1 Reseat I/O module and system module.
2 Replace I/O module.
1-14