Cover Presence Switch - Lenovo 30C7 Hardware Maintenance Manual

The coin-cell battery normally requires no charging or maintenance throughout its life; however, no battery
lasts forever. If the coin-cell 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 and Warranty Guide for information about
disposing of the coin-cell battery.
To remove and install the coin-cell battery, do the following:
1. Prepare your computer. See "Preparing your computer" on page 92.
2. Locate the coin-cell battery. See "Parts on the system board" on page 37.
3. Remove any PCIe cards that might prevent your access to the coin-cell battery. See "PCIe card" on
page 94.
4. Remove the old coin-cell battery as shown.
Figure 39. Removing the coin-cell battery
5. Install the new coin-cell battery as shown.
Figure 40. Installing the coin-cell battery
6. Reinstall the PCIe cards if you have removed them. See "PCIe card" on page 94.
7. Close the drive bay assembly and reinstall the front bezel. Then, reinstall the computer cover and
reconnect the cables. See "Completing the parts replacement" on page 154.
Note: When the computer is turned on for the first time after the coin-cell battery is replaced, an error
message might be displayed. This is normal after the coin-cell battery is replaced.
8. Turn on the computer and all attached devices.
9. Use the Setup Utility program to set the date, time, and any passwords. See "Using the Setup Utility
program" on page 61.

Cover presence switch

Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 "Read this first: Important safety information" on page 1.
To remove or install the cover presence switch, do the following:
.
Chapter 9 Hardware removal and installation
109