Identifying Problems Using Leds - IBM totalstorage 326 User Reference

v Diagnostic programs and error messages
v Light-path diagnostics
v Networking adapter diagnostic tools
v Troubleshooting charts
v Support

Identifying problems using LEDs

The LEDs are part of the light-path diagnostics built into the Model 326 engine. The
LEDs help you identify the type of system error that occurred. See the following
sections for more information.
Power supply LEDs
The AC and DC power LEDs on the power supply provide status information about
the power supply.
Table 7 on page 87 describes the AC and DC power LEDs.
Note: The minimum configuration required for the DC good light to come on is:
86
Model 326 User's Reference
POST error messages and descriptions are given in "Appendix D. Engine POST
and diagnostic program messages" on page 135.
The diagnostic programs are stored in upgradable read-only memory (ROM) on
the system board. These programs are the primary method of testing the major
components of the Model 326 engine. See "Diagnostic program messages" on
page 145 for more information.
The engine has light-emitting diodes (LEDs) on its system board to help you
identify problems. These LEDs are part of the light-path diagnostics that are built
into the Model 326 engine. By following the path of lights, you can quickly identify
the type of system error that occurred. See "Light-path diagnostics" on page 88
for more information.
– Intel PROSet II
See "Testing the Ethernet adapters with Intel PROSet II" on page 99.
– FAStT MSJ
See "Testing the Fibre Channel host adapter with FAStT MSJ" on page 108
These charts list problem symptoms, along with suggested steps to correct the
problems. See "Engine troubleshooting charts" on page 89 for more information.
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www.ibm.com/storage/support/nas
v Power supply
v Power backplane
v System board (with pins 2 and 3 on J23 extension cable connected
together to bypass the power switch).