HP J4899B User Manual - Page 48

Diagnosing with the LEDs, Troubleshooting, Table 4-1., LED Error Indicators

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Troubleshooting Diagnosing with the LEDs Diagnosing with the LEDs Table 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 4-1. LED Error Indicators LED Pattern Indicating Problems Power Fault Self Test Fan Status Port LED Diagnostic (in Link view mode) Tips Off with * * * * ➊ power cord plugged in 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 ➏ connected On Off Off * On, but the port is not ➐ communicating * This LED is not important for the diagnosis. † The blinking behavior is an on/off cycle once every 1.6 seconds, approximately. Troubleshooting 4-4

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4-4
Troubleshooting
Diagnosing with the LEDs
Troubleshooting
Diagnosing with the LEDs
Table 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 4-1.
LED Error Indicators
LED Pattern Indicating Problems
Diagnostic
Tips
Power
Fault
Self Test
Fan
Status
Port LED
(in Link view 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
*
This LED is not important for the diagnosis.
†
The blinking behavior is an on/off cycle once every 1.6 seconds, approximately.