Lenovo 3797 manual Removing the cover

1	Cover	11	CD/DVD drive
2	PCI riser-card assembly	12	Operator information panel
3	PCI riser-card assembly	13 Front bezel (some models)
4	Heat sink	14	4-drive filler panel
5	Microprocessor	15 SAS hard disk drive backplanes
6	Heat-sink retention module	16	SAS riser card
7	DIMM	17	Fan bracket
8	System board	18	Fans
9	Power-supply filler panel	19	DIMM air baffle
10	Power supply	20 Microprocessor 2 air baffle

Removing the cover

Important: Before you install optional hardware, make sure that the server is working correctly. Start the server, and make sure that the operating system starts, if an operating system is installed, or that a 19990305 error code is displayed, indicating that an operating system was not found but the server is otherwise working correctly. If the server is not working correctly, see the Hardware Maintenance Manual for diagnostic information.

To remove the cover, complete the following steps:

1.Read the safety information that begins on page vii and “Installation guidelines” on page 33.

2.If you are planning to view the error LEDs that are on the system board and components, leave the server connected to power and go directly to step 4 on page 38.

3.If you are planning to install or remove a microprocessor, memory module, PCI adapter, battery, or other non-hot-swap optional device, turn off the server and all attached devices and disconnect all external cables and power cords (see “Turning off the server” on page 31).

Chapter 5. Installing optional devices and replacing customer replaceable units 37