Diagnosing With The Leds - HP ProCurve 4000M Installation Manual

Troubleshooting

Diagnosing with the LEDs

Diagnosing with the LEDs
Tables 3-1 shows LED patterns on the switch and the switch modules that
indicate problem conditions.
1.
2.
Table 3-1.
Off with *
power
cord
plugged
in
On Prolonged Prolonged
On
†
On Flashing Flashing
†
On Flashing
On Off
†
On Flashing
†
On Flashing
On Off
* This LED is not important for the diagnosis.
†
The flashing behavior is an on/off cycle once every 1.6 seconds, approximately.
3-4
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
* *
Prolonged
On On
† †
Flashing
†
Off Flashing Flashing
Off Off Flashing
Off Off
Off Off
Off Off On
* * *
* * *
* * *
†
* *
†
* *
†
* Flashing *
* * Flashing
* *
Diagnostic
Tips
*
*
*
*
*
*
†
*
Off with
cable
connected