HP ProCurve 2224 Installation Manual page 21

Power and Fault LEDs
When the switch is powered on, it performs its diagnostic self test. The
self test takes approximately 3 seconds to complete.
LED Behavior:
During the self test:
• All the switch and port LEDs are on.
When the self test completes successfully:
• The large Power LED stays on and the large Fault LED goes off.
• The port LEDs (Link and Mode) go into their normal operational
mode.
If the LED display is different than what is described above, especially if
the Fault LED stays on for more than 30 seconds or it starts blinking, the
self test has not completed correctly. Refer to chapter 3, "Trouble-
shooting" for diagnostic help.
switch port LEDs
Installing the Switch 2224
Installation Procedures
2-7