Check that AC power cords are attached rmly to the server’s power supplies and to the AC
sources.
Check that the main cover is rmly in place.
There is an intrusion switch on the motherboard that automatically shuts down the server
power to standby mode when the cover is removed.
▼
How to Inspect the Outside of the Server
Inspect the external status indicator LEDs, which can indicate component malfunction.
For the LED locations and descriptions of their behavior, see
“Sun Fire X4640 Server External
LED Locations and Meanings” in Sun Fire X4640 Server Service Manual
.
Verify that nothing in the server environment is blocking air ow or making a contact that could
short out power.
If the problem is not evident, continue with
“How to Inspect the Inside of the Server”on
page 12
.
▼
How to Inspect the Inside of the Server
Prepare the server for service. See “Preparing the Server for Service and Operation”in Sun Fire
X4640 Server Service Manual
.
Choose a method for shutting down the server from main power mode to standby power mode.
■
Graceful shutdown: Use a ballpoint pen or other nonconducting stylus to press and release
the Power button on the front panel. This causes Advanced Conguration and Power
Interface (ACPI) enabled operating systems to perform an orderly shutdown of the
operating system. Servers not running ACPI-enabled operating systems will shut down to
standby power mode immediately.
■
Emergency shutdown: Use a ballpoint pen or other nonconducting stylus to press and hold
the Power button for four seconds to force main power o and enter standby power mode.
When main power is o, the Power/OK LED on the front panel will begin ashing,
indicating that the server is in standby power mode.
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Troubleshooting the Server
Sun Fire X4640 Server Diagnostics Guide • December 2010, Rev A12
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