Lenovo System x3750 M4, Инструкция по установке и обслуживанию

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Table 22. Light path diagnostics panel LEDs (continued)
• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• See Chapter 5 “Parts listing, Lenovo System x3750 M4 Type 8753” on page 203 to determine which
components are customer replaceable units (CRU) and which components are field replaceable units (FRU).
• If a action step is preceded by (Trained service technician only), that step must be performed only by a trained
service technician.
LED Description Action
TEMP The system temperature has
exceeded a threshold level.
A failing fan can cause the
TEMP LED to be lit. 1. Make sure that the air vents are not blocked.
2. Make sure that all fans are seated correctly.
3. Determine whether a fan has failed (indicated by a lit LED on the
fan). If it has, replace the fan.
4. Make sure that the heat sink is seated correctly.
5. Make sure that the room temperature is not too high. See “Server
features and specifications” on page 5 and “Installation guidelines”
on page 38 for the server temperature information.
FAN A fan has failed, is operating
too slowly, or has been
removed. The TEMP LED
might also be lit. 1. Check the LEDs on the hot-swap fan.
2. Reseat the failing fan, which is indicated by a lit LED on the fan.
3. Replace the failing fan.
BOARD An error has occurred on the
system board. 1. Check the LEDs on the server.
2. Check the LEDs on the system board to identify the component
that caused the error. The BOARD LED can be lit due to many
reasons, for example:
• RAID cache card
• Battery
• Failed system board
3. Check the IMM2 event log for information about the error.
4. Replace any failed or missing replacement components, such as
the battery.
5. (Trained service technician only) replace the server system board.
HDD A hard disk drive has failed
or is missing. 1. Check the LEDs on the hard disk drives for the drive with a lit
status LED and reseat the hard disk drive.
2. Make sure that the cables are correctly connected to the hard disk
drive backplane.
3. For more information, see “Hard disk drive problems” on page 183.
4. If the error remains, replace the following components in the order
listed, restarting the server after each:
a. Replace the hard disk drive.
b. Replace the hard disk drive backplane.
Power-supply LEDs
This section provides information about the power supply LEDs.
The following minimum configuration is required for the AC LED on the power supply to be lit:
• Power supply
• Power cord
• Appropriate input power from the power source
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Lenovo System x3750 M4 Installation and Service Guide