Lenovo ThinkServer RD550 - Manual (Page 146)

12. Refer to your note to reconnect the cables to the backplane.
13. If you are instructed to return the old hot-swap hard-disk-drive backplane, follow all packaging
instructions and use any packaging materials that are supplied to you for shipping.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the replacement, go to “Completing the parts replacement” on page 144.
Replacing a system fan
Attention: Do not open your server or attempt any repair before reading and understanding “Safety information”
on page iii and “Guidelines” on page 61.
Your server supports up to eight hot-swap system fans. This design helps you to avoid significant cooling
problems when a system fan fails and you can replace a hot-swap system fan without turning off the server.
CAUTION:
Hazardous moving parts. Keep fingers and other body parts away.
Before you begin, print all the related instructions or ensure that you can view the PDF version on another
computer for reference.
Note: Depending on the model, your server might look slightly different from the illustrations in this topic.
To replace a system fan, do the following:
1. Prepare your server. See “Removing or extending the server from the rack cabinet” on page 63.
2. Remove the server cover. See “Removing the server cover” on page 63.
3. Remove the cooling shroud. See “Removing and reinstalling the cooling shroud” on page 66.
4. Locate the system fans. View the system fan error LEDs on the system board to locate the failing system
fan. See “System fan fault LEDs” on page 43.
132 ThinkServer RD550 User Guide and Hardware Maintenance Manual