D-Link DP-311U Manual page 11

Power ON Self-Test
Every DP-311U has been factory-tested to operate properly.
When the DP-311U is powered ON, it also automatically performs a Self-Test on
each of its major components. The final result of the Self-Test is signaled by the
state of the USB LED indicator following the Self-Test. Preliminary to the actual
component tests, the LED indicators are tested to confirm their steady and
flashing operation.
Immediately after power-up, all three of the green LEDs should illuminate steadily
for several seconds. Then the USB LED should flash ON three times.
Irregularity of the LED during this LED test may mean there is a problem with the
LED itself.
The actual component tests immediately follow the LED tests. A normal (no fault)
result is signaled by a flashing of the USB LED, followed by a darkened LED.
If the Self-Test routine detects any component error, then following the LED tests
the Self-Test will halt and the LEDs will continuously signal the error according to
the following table. In the event of any such error signal, contact your dealer for
correction of the faulty unit.
USB LED
low speed flashing
steady ON
1 long 2 short
1 long 3 short
1 long 5 short
1 long 6 short
1 long 7 short
1 long 11 short
1 long 15 short
1 long 16 short
1 long 17short
1 long 18 short
Faulty Component
Need to reload firmware
DRAM error
Timer INT error
Flash Protected
Flash Erase/Program error
LAN Controller error
LAN memory error
LAN I/O base error
Wireless LAN card detect error
Wireless LAN card CIS error
Wireless LAN card I/O error
USB error
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