Lenovo System x3550 M5 Installation And Service Manual page 74

The following illustration shows the LEDs on the system board.
DIMM 19-24
error LEDs
Microprocessor 2
error LED
Fan 8
error LED
Figure 29. System board error LEDs
Some eight 2.5-inch server models come with an LCD operating panel assembly. The LCD operating panel
assembly displays a current list of errors reported by the system and other information. See the "LCD
operating panel assembly" on page 19 for more information about the LCD operating panel assembly.
Note: The LCD operating panel assembly is only available on the eight 2.5-inch server models with the
advanced media cage.
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 the microprocessor socket 1
• One 8 GB DIMM on the system board
• One power supply
• Power cord
• Five fans
ac power-supply LEDs
Use this information to view ac power-supply LEDs.
60
Lenovo System x3550 M5 Installation and Service Guide
DIMM 7-18
error LEDs
Fan 7 Fan 6 Fan 5
error LED error LED error LED
System System IMM2
error locator Power heartbeat
LED LED LED LED
Fan 3 Fan 2
error LED error LED
Coin-cell-battery
error LED
ServeRAID error LED
Microprocessor 1
error LED
DIMM 1- 6
error LEDs
Fan 1
error LED