3-3
Troubleshooting
Diagnosing with the LEDs
Troubleshooting
Diagnosing with the LEDs
Table 3-1 shows LED patterns on the switch that indicate problem conditions.
1. Check in the table for the LED pattern that you see on your switch.
2. Refer to the corresponding diagnostic tip on the next few pages.
Table 3-1. LED Error Indicators
Diagnostic Tips:
LED Pattern Indicating Problems
Diagnostic Tips
Power Fault Port Link
Off with power cord
plugged in
**
➊
On Prolonged On *
➋
On Off Off with cable
connected
➌
On Blinking
†
Blinking
†
(for port 25)
➍
* This LED is not important for the diagnosis.
†
The blinking behavior is an on/off cycle once every 1.6 seconds, approximately.
Tip
Number
Problem Solution
➊ The switch is not
plugged into an
active AC power
source, or the
switch’s power
supply may have
failed.
1. Verify that the power cord is plugged into an active power source and to the
switch. Make sure these connections are secure.
2. Try power cycling the switch by unplugging and plugging the power cord back in.
3. If the Power LED is still not on, verify that the AC power source works by plugging
another device into the outlet. Or try plugging the switch into a different outlet or
try a different power cord.
If the power source and power cord are OK and this condition persists, the switch
power supply may have failed. Call your HP-authorized LAN dealer, or use the
electronic support services from HP to get assistance. See the Customer Support/
Warranty booklet for more information.
➋ A switch hardware
failure has
occurred during
self test.
Try power cycling the switch. If the fault indication reoccurs, the switch may have
failed. Call your HP-authorized LAN dealer, or use the electronic support services
from HP to get assistance. See the Customer Support/Warranty booklet for more
information.
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