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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 and time information are lost.
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 98.
2. Lay the computer on its side for easier access to the system board.
3. Locate the coin-cell battery. See “Parts on the system board” on page 38.
4. Remove any PCIe cards that might prevent your access to the coin-cell battery. See “PCIe card” on
5. Remove the old coin-cell battery as shown.
Figure 82. Removing the coin-cell battery
6. Install the new coin-cell battery as shown.
Figure 83. Installing the coin-cell battery
7. Reinstall the PCIe cards if you have removed them. See “PCIe card” on page 103.
8. 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 187.
Note:
When the computer is turned on for the first time after replacing the coin-cell battery, an error
message might be displayed. This is normal after replacing the coin-cell battery.
9. Turn on the computer and all attached devices.
10. Use the Setup Utility program to set the date and time. See “Using the Setup Utility program” on page
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:
1. Prepare your computer. See “Preparing your computer” on page 98.
2. Locate the cover presence switch. See “Computer components” on page 33.
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