Diagnosing With The Leds - HP J4897A Installation Manual

Diagnosing with the LEDs

Table 3-1 shows LED patterns on the switch that indicate problem conditions.
1.
2.
Table 3-1.
Off with power cord
* This LED is not important for the diagnosis.
Diagnostic Tips:
Tip
Number Problem
➊
The switch is not
plugged into an
active AC power
source, or the
switch's power
supply may have
failed.
➋
A switch hardware
failure has
occurred during
self test.
Check in the table for the LED pattern that you see on your switch.
Refer to the corresponding diagnostic tip on the next few pages.
LED Error Indicators
LED Pattern Indicating Problems
Power Fault
*
plugged in
On Prolonged On
On Off
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 that came with your switch for more information.
Try power cycling the switch. If the fault indication reoccurs, the switch has failed
its self test. Call your HP-authorized LAN dealer, or use the electronic support
services from HP to get assistance. See the Customer Support/Warranty booklet that
came with your switch for more information.
Diagnosing with the LEDs
Port Link
Diagnostic Tips
*
*
Off with cable
connected
Solution
Troubleshooting
➊
➋
➌
3-3