D-Link DP-G321 manual Power on Self-Test, Faulty Component

Power ON Self-Test

Every DP-G321 has been factory-tested to operate properly.

When the DP-G321 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, three of the green LEDs should illuminate steadily for several seconds. Then the USB LED should flash 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.

USB LED		Faulty Component
low speed flashing		Need to reload firmware
steady ON		DRAM error
1 long	2 short	Timer INT error
1 long	3 short	Flash Protected
1 long	5 short	Flash Erase/Program error
1 long	6 short	LAN Controller error
1 long	7 short	LAN memory error
1 long 11 short		LAN I/O base error
1 long 15 short		Wireless LAN card detect error
1 long 16 short		Wireless LAN card CIS error
1 long 17short		Wireless LAN card I/O error
1 long 18 short		USB error

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