IBM eServer xSeries 440 Installation Manual page 68

problem if an error causes the server to shut down. See "Light Path Diagnostics table"
on page 58.
Important: You have up to 12 hours to use the Light Path Diagnostic LEDs after ac
power has been removed from the server. After 12 hours, you must power-on the
server again to be able to use the Light Path Diagnostic LEDs to help locate system
errors.
To view the LEDs when the server cover has been opened:
1. Turn off the server and all peripheral devices; then, disconnect all external cables
2. Slide the server out of the rack cabinet.
3. Open the top cover.
4. Press and hold the Light Path Diagnostics (blue) button on the diagnostics panel.
5. Close the cover on the server; then, slide the server into the rack cabinet and
The following illustration shows the LEDs on the diagnostics panel on the system
board. See "Light Path Diagnostics table" on page 58 for information on identifying
problems using these LEDs.
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xSeries 440:Installation Guide
from the server.
The LEDs will be illuminated while the button is pressed.
Note: You can illuminate the LEDs for a maximum of two minutes. After that time,
the circuit that powers the LEDs is exhausted.
connect all external cables. For more information, see "Completing the
installation" on page 31 for instructions.