HP 12M Manual de Instalação descarregar pdf (Página 36)

3-4

Troubleshooting

Diagnosing with the LEDs

Troubleshooting

Diagnosing with the LEDs

The following table shows LED patterns on the hubs that indicate problem

conditions.

Diagnostic Tips:

LED patterns indicating problems Diagnostic

Tips

Power Fault Link

(per port)

Activity Collision

OFF OFF OFF ––

➊

ON OFF OFF with a

network

cable

connected

––

➋

ON OFF Slow Blink

†

––

➌

ON ON for a

prolonged

period

Variable, all

may be ON

––

➍

ON Off Fast Blink

‡

––

➎

ON OFF ON ON

continuously

➏

†

The slow blink behavior is an on/off cycle once every 1.6 seconds

‡

The fast blink behavior is an on/off cycle once every 0.8 seconds

Tip Problem Solution

➊

The hub is not

plugged into an

active AC power

source, or the

hub’s power

supply may have

failed.

1. Verify that the power cord is plugged into an active power source and to the hub. Make

sure these connections are snug.

2. Try power cycling the hub 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 hub into a different outlet or try a

different power cord.

If the power source and power cord are OK and this condition persists, the hub 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 card for more

information.

9934.book Page 4 Thursday, January 14, 1999 12:39 PM

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