HP J4818A, Installation And Getting Started Manual

Page: 48 / 88

3-4
Troubleshooting
Diagnosing with the LEDs
T
rou
bl
esh
oot
in
g
Diagnosing with the LEDs
Tables 3-1 shows LED patterns on the switch and the switch modules 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
LED Pattern Indicating Problems
Diagnostic
Tips
Power Fault Self Test
Fan
Status
Port Link Port Mode LED
(in Attention Mode - !)
Off with
power cord
plugged in
* * * * *
➊
On Prolonged On Prolonged On * * *
➋
On Blinking
†
Blinking
†
* * *
➌
On Blinking
†
Off Blinking
†
* *
➍
On Blinking
†
Blinking
†
* Blinking
†
*
➎
On Off Off * Off with cable
connected
*
➏
On Off Off * On, but the port is
not communicating
*
➐
On Off Off * Blinking
†
*
➑
On Off Off * On Flashing frequently
➒
* This LED is not important for the diagnosis.
†
The blinking behavior is an on/off cycle once every 1.6 seconds, approximately.
2353-ed2.book Page 4 Friday, February 9, 2001 6:00 PM