Lenovo ThinkStation 4215, Hardware Maintenance Manual, Page: 104 / 180

10. Reconnect the power supply assembly cables to the system board and each of
the drives.
11.
Secure the power supply assembly cables with the cable clips and ties in the
chassis.
What to do next:
v To work with another piece of hardware, go to the appropriate section.
v
To complete the replacement, go to “Completing the FRU replacement” on
page 122.
Replacing the battery
Attention
Do not open your computer or attempt any repair before reading and
understanding the “Important safety information” in the
ThinkStation Safety
and Warranty Guide that came with your computer. To obtain a copy of the
ThinkStation Safety and Warranty Guide , go to:
http://www.lenovo.com/support
This section provides instructions on how to replace the battery.
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 battery notice” in the ThinkStaion Safety and Warranty Guide
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 87.
3. Locate the battery. See “Locating parts on the system board” on page 86.
4. Remove any parts that may prevent your access to the battery.
5. Remove the old battery.
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Hardware Maintenance Manual