IBM x 340 Series, Hardware Maintenance Manual

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Installing options
45
c
11
d
DIMM4 failure (CR20)
Before you begin
Before you begin to install options in your server, read the following information:
• Become familiar with the safety and handling guidelines specified under
“Working inside a server with power on” on page 46, “Handling static-sensitive
devices” on page 46, and read “Safety information” on page 137. These guidelines
will help you work safely while working with your server or options.
• You do not need to turn off the server to install or replace hot-swap power
supplies, hot-swap drives, hot-swap fans, or hot-plug PCI adapters.
• The orange color on components and labels in your server indentifies hot-swap or
hot-plug components. This means that you can install or remove the component
while the system is running, provided that your system is configured to support
this function. For complete details about installing or removing a hot-swap or hot-
plug component, see the information provided in this chapter.
• The blue color on components and labels indentifies touch points where a
component can be gripped, a latch moved, and so on.
• Make sure that you have an adequate number of properly grounded electrical
outlets for your server, monitor, and any other options that you intend to install.
• Back up all important data before you make changes to disk drives.
• Have a small, flat-blade screwdriver available.
System reliability considerations
To help ensure proper cooling and system reliability, make sure:
Table 9. Diagnostics panel LEDs.
CR LED Description
29 PS1 Power supply 1 failure.
30 PS2 Power supply 2 failure.
31 PS3 Not used.
32 NON Non-redundant power.
33 OVER Overspecification. The system has exceeded the power capibilities of the installed
power supply units.
34 NMI Non-maskable-interrupt occurred.
22 TEMP System temperature exceeded maximum rating.
23 FAN
A fan failed or is operating slowly.
24 MEM Memory failure. One or more dual in-line memory modules (DIMMS) failed.
25 CPU Microprocessor failure. One or both microprocessors failed.
26 PCI 1 Error on primary PCI channel (A) or system board.
27 PCI 2 Error on secondary PCI channel (B) or system board.
58 VRM Error on voltage regulator module or on integrated voltage regulator.
53 DASD1
SCSI bus A failure. The SCSI backplane (if any) or a device connected to SCSI bus
A failed.
57 DASD2 SCSI bus B failure. The SCSI hot-swap disk drive backplane on SCSI bus B failed.