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4-1

Troubleshooting

This section describes how to troubleshoot the switch. For more information,

see the chapter “Troubleshooting” in the HP 1810 Switch Series Management

and Configuration Guide, available on the HP Web site,

http://www.hp.com/networking/support.

This chapter describes the following:

■ basic troubleshooting tips (page 4-1)

■ diagnosing with the LEDs (page 4-2)

■ forgotten the IP address or password (page 4-4)

■ testing the switch by resetting It (page 4-5)

■ HP Customer Support Services (page 4-5)

Basic Troubleshooting Tips

Common problems and their solutions are listed in the following table.

Problem Resolution

Switch fails Power-On Self

Test (POST)

Troubleshoot using the LEDs. See “Diagnosing with

the LEDs” on page 4-2

Link light does not light when

a cable is connected.

The switch may be enabled in Green Mode, where port

Link LEDs would be off.

Look for loose or obviously faulty connections. If they

appear to be OK, make sure the connections are snug. If

that does not correct the problem, try a different cable.

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