Lenovo System x3550 M4 Installation And Service Manual page 143

Table 14. 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.
• If an action step is preceded by "(trained technician only)," that step must be performed only by a trained
technician.
Description
LED
BOARD An error has occurred on the
system board or the system
battery.
HDD A hard disk drive has failed or is
missing.
Power-supply LEDs
Use this information to view power-supply LEDs.
The following minimum configuration is required for the server to start:
• One microprocessor in microprocessor socket 1
• One 2 GB DIMM on the system board
• One power supply
• Power cord
• Four cooling fans (fan 1, 2, 3, and 5)
• One PCI riser-card assembly in PCI connector 1
AC power-supply LEDs
Use this information to view AC power-supply LEDs.
The following minimum configuration is required for the DC LED on the power supply to be lit:
• Power supply
• Power cord
Action
1. Check the LEDs on the system board to identify the
component that caused the error. The BOARD LED can be
lit due to any of the following reasons:
• Battery
• (Trained technician only) System board
2. Check the system-error log for information about the error.
3. Replace the failing component:
• Battery (see "Removing the system battery" on page
268 and "Replacing the system battery" on page 270).
• (Trained technician only) System board (see "Removing
the system board" on page 298 and "Replacing the
system board" on page 301).
1. Check the LEDs on the hard disk drives for the drive with a
lit status LED and reseat the hard disk drive.
2. Reseat the hard disk drive backplane.
3. For more information, see "Light path diagnostics LEDs"
on page 124.
4. If the error remains, replace the following components one
at a time, in the order listed, restarting the server after
each:
a. Replace the hard disk drive.
b. Replace the hard disk drive backplane.
5. If the problem remains, go to
entry/portal/docdisplay? lndocid=SERV-CALL
http://www.ibm.com/support/
.
.
Chapter 4 Troubleshooting
129