Cover Presence Switch (Intrusion Switch) - Lenovo ThinkCentre M70a Gen 2 Hardware Maintenance Manual
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Also See for ThinkCentre M70a Gen 2:
- Hardware maintenance manual (100 pages) ,
- User manual (50 pages) ,
- User manual (82 pages)
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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 and time information is 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" in the Safety and Warranty
Guide.
For access, remove the following parts in order, if any:
• "Computer stand" on page 64.
• "Rear cover" on page 67.
• "Optical drive" on page 68.
• "Optical drive holder" on page 70.
• "System board shield" on page 71.
• "VESA mount bracket cover" on page 73.
• "VESA mount bracket" on page 76.
• "Hard disk drive and bracket" on page 77.
Removal steps
Note: After installing a new coin-cell battery, reset the system date and time in the UEFI BIOS menu.
Cover presence switch (intrusion switch)
Prerequisite
Before you start, read Chapter 1 "Important safety information" on page 1 and print the following
instructions.
For access, do the following:
1. Remove the following parts in order, if any:
• "Computer stand" on page 64.
.
99
Chapter 6
Hardware removal and installation
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