IBM 88371RU, Maintenance And Troubleshooting Manual

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Note: If this LED is off, it does not mean that there is no electrical power in the
server. The LED might be burned out. To remove all electrical power from
the server, you must disconnect the power cord from the electrical outlet.
v Power-control button: Press this button to turn the server on and off manually.
A power-control-button shield comes with the server. You can install this
disk-shaped shield to prevent the server from being turned off accidentally.
v Hard disk drive activity LED: When this green LED is lit, it indicates that one of
the hard disk drives is in use.
Note: Hard disk drive activity for the SCSI drives is shown in two places: on the
hard disk drive itself, and also on the hard disk drive activity LED on the
operator information panel.
There is no hard disk drive activity LED for the SATA drive. The only place
the SATA drive indicates hard disk drive activity is on the operator
information panel.
v
Location LED: Use this blue LED to visually locate the server if it is in a location
with numerous other servers. You can use IBM Director to light this LED
remotely. This LED is controlled by the BMC.
v
Information LED: When this amber LED is lit, it indicates that a non-critical
event has occurred. Check the light path diagnostics panel (see “Light path
diagnostics” on page 73) and the error log (see “POST error logs” on page 69).
Light path diagnostics panel
The light path diagnostics feature on the xSeries 336 server provides a preliminary
method of determining the location of a problem.
The LEDs on the light path diagnostics panel are viewed by pressing the release
latch on the front right side of the operator panel and sliding the panel out.
For more detailed information about light path diagnostics, see “Light path
diagnostics” on page 73.
Figure 6. Light path diagnostics panel
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xSeries 336 Type 1879 and Type 8837: Hardware Maintenance Manual and Troubleshooting Guide