Lenovo ThinkServer RD550 - Manual (Page 57)

System fan fault LEDs
The following illustration shows the system fan fault LEDs on the system board.
Figure 27. System fan fault LEDs
1 - 8 System fan fault LEDs 1 to 8
When a System fan fault LED on the system board is lit, it indicates that the corresponding system fan is
operating too slowly or has failed. To solve the problem, you might need to reinstall or replace the system
fan. See “Replacing a system fan” on page 132. If it is a system board problem, contact the Lenovo
Customer Support Center.
Chapter 3 . Product overview 43