Lenovo ThinkCentre M720t, Руководство пользователя и руководство по техническому обслуживанию аппаратного обеспечения

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Figure 117. Locking the microprocessor socket retainer
Figure 118. Closing the drive bay
5. Complete the replacement. See “Completing the parts replacement” on page 74.
Replacing the coin-cell battery
Attention: Do not open your computer or attempt any repairs before reading the Important Product
Information Guide .
Note: Your computer has a special type of memory that maintains the date, time, and settings for built-in
features, such as parallel connector assignments (configurations). A coin-cell battery keeps this information
active when you turn off the computer.
The coin-cell battery normally requires no charging or maintenance throughout its life; however, no coin-cell
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.
To dispose of the coin-cell battery, refer to the “Lithium coin-cell battery notice” topic in the Safety and
Warranty Guide .
To replace the coin-cell battery,
1. Remove the computer cover. See “Removing the computer cover” on page 23.
2. Remove the front bezel. See “Replacing the front bezel” on page 23.
3. Replace the coin-cell battery.
Chapter 4
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Replacing hardware
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