HP ProCurve J8161A Installation And Getting Started Manual page 48

Troubleshooting
Diagnosing with the LEDs
Tip Problem
The connection
is not working
properly.
EPS power is not
available.
EPS Backup
power is not
available.
Internal power
supply has failed.
3-4
Try the following procedures:
• For the indicated port, verify that both ends of the cabling, at the unit and the connected
device, are connected properly.
• Verify the connected device and unit are both powered on and operating correctly.
• If the other procedures don't resolve the problem, try using a different port or a different
cable.
A PoE switch is connected to the port, but is not requesting EPS power.
Check the log file of the connected switch for more detailed information. Possible causes
are an over-current condition on the port; a failure to successfully communicate with a
connected device; a failed EPS power supply in the unit. Try disconnecting, then
reconnecting the EPS cable. Wait three to four seconds for the device to successfully
communicate for EPS power. Also try another EPS cable. If this fails to restore EPS power,
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.
Verify the backup power cable is connected to each HP 610 EPS in the group. If the backup
power cable is properly connected, and the other units are powered on without internal
power fault conditions, then the backup power cable may be faulty.
The HP 610 EPS unit's internal power supply has failed and the unit is being powered by
another HP 610 EPS in the backup power group.
1. Verify the AC power cord is plugged into an active power source and to the unit. Make
sure these connections are snug.
2. If the Internal Power Status LED does not go on, verify the AC power source works by
plugging another device into the outlet. Or try plugging the unit into a different outlet
or try a different AC power cord.
If the AC power source and power cord are OK and this condition persists, the unit's 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.
Solution