Replacing The Battery - Lenovo ThinkCentre M73 10B0 Hardware Maintenance Manual

10. Position the new memory module over the memory slot. Ensure that the notch
module is aligned with the key
slot until the retaining clips fully close.
Note: Ensure that the memory module is seated securely and cannot be moved easily.
Figure 78. Installing a memory module
11. Reinstall the PCI Express x16 graphics card if you had removed it. See "Installing or replacing a PCI
Express card" on page 139.
12. Reinstall the heat sink fan duct. See "Replacing the heat sink and fan assembly" on page 157.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to "Completing the parts replacement" on page 183.

Replacing the battery

Attention: Do not open your computer or attempt any repair before reading and understanding the
"Important safety information" on page 1.
Your computer has a special type of memory that maintains the date, time, and settings for built-in features,
such as parallel-port assignments (configuration). A battery keeps this information active when you turn
off the computer.
The battery normally requires no charging or maintenance throughout its life; however, no battery lasts
forever. If the battery fails, the date, time, and configuration information (including passwords) are lost. An
error message is displayed when you turn on the computer.
Refer to the "Lithium coin cell battery notice" in the Safety, Warranty, and Setup Guide that came with your
computer for information about replacing and disposing of the battery.
To replace the battery, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Remove the computer cover. See "Removing the computer cover" on page 136.
3. Remove the heat sink fan duct. See "Replacing the heat sink and fan assembly" on page 157.
4. Depending on your computer model, you might need to remove the PCI Express x16 graphics card for
easier access to the battery. See "Installing or replacing a PCI Express card" on page 139.
2 in the slot. Then, push the new memory module straight down into the
.
Chapter 10 Replacing FRUs (machine types: 10B4, 10B5, 10B6, 10B7, 10HL, and 10HM)
1 on the new memory
143