Diagnostics And Troubleshooting; Switch Diagnostics; Input Power Led Is Extinguished; Switch Leds - HP AK241A - StorageWorks 8Gb Simple SAN Connection Installation And Reference Manual

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Diagnostics and troubleshooting

Diagnostic information about the switch is available through the switch LEDs and the port LEDs. Diagnostic
information is also available through the CLI, QuickTools, or Simple SAN Connection Manager event logs
and error displays. This section describes the following types of diagnostics:
• Switch diagnostics, page 47 describes the Input Power LED and System Fault LED indications.
• Power-On self test
indications.
• Transceiver
This section also describes using maintenance mode to recover a disabled switch. See
switch using maintenance

Switch diagnostics

The 8/20q Fibre Channel Switch has three switch LEDs that are used for diagnostics: Input Power LED,
Heartbeat LED, and the System Fault LED
3
1 Input Power LED
3 Heartbeat LED
Figure 14

Switch LEDs

The following conditions are described in this section:
• Input power LED is
• System fault LED is

Input power LED is extinguished

The Input Power LED illuminates to indicate that the switch logic circuitry is receiving proper voltages. If the
Input Power LED is extinguished:
1. Inspect the power cords and connectors. Is the cord unplugged? Is the cord or connector damaged?
• Yes—Make necessary corrections or repairs. If the condition remains, continue.
• No—Continue.
2. Inspect the AC power source. Is the power source delivering the proper voltage?
• Yes—Continue.
• No—Make necessary repairs. If the condition remains, contact your authorized maintenance
provider.
diagnostics, page 48 describes the Heartbeat LED and the port Logged-in LED
diagnostics, page 52 lists the transceiver diagnostic information that is available.
mode" on page 53.
1
2
extinguished, page 47
illuminated, page 48
(Figure 14).
2 System Fault LED
8/20q Fibre Channel Switch Installation and Reference Guide
"Recovering a
47