Hardware Diagnostic Tests; Testing The Switch By Resetting It; Checking The Switch Leds; Testing Twisted-Pair Cabling - HP ProCurve 408 Installation Manual

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Troubleshooting

Hardware Diagnostic Tests

If you believe that the switch is not operating correctly, you can reset

the switch to test its circuitry. To reset the switch, unplug and plug in

the adapter's power cord (power cycling).

Power cycling causes the switch to perform its power-on self-test, and

almost always will resolve any temporary operational problems.

The self-test passes if the Fault LED on the front of the switch goes

off after approximately 3 seconds. If this LED stays on longer than 5

seconds, an error condition has been detected on the switch.

See "Diagnosing With the LEDs" on page 3-4 for information on

interpreting the LED patterns.

If you think the cable should work but still isn't working, it may not

be compatible with the IEEE 802.3 Type 10Base-T or 100Base-TX

standards. The twisted-pair cables attached to the Switch 408 must

be compatible with these standards. To verify that your cable is

compatible with these standards, use a qualified cable test device.

HP also offers a wire testing service. Contact your HP-authorized LAN

dealer or your local HP sales office for more information.

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