Lenovo 30GL003YGE, Hardware Maintenance Manual, Page: 55 / 102

External options
You can connect external options to your computer, such as external speakers, a printer, or a scanner. For
some external options, you must install additional software in addition to making the physical connection.
When installing an external option, see Chapter 3 “Product overview” on page 29 to identify the required
connector. Then, use the instructions that come with the option to help you make the connection and install
any required software or device drivers.
Computer cover
Prerequisite
Before you start, read Generic Safety and Compliance Notices , and print the following instructions.
Before you open the computer cover, turn off the computer and wait several minutes until the computer is
cool.
For access, do the following:
1. Remove any media from the drives and turn off all connected devices and the computer.
2. Disconnect all power cords from electrical outlets and disconnect all cables from the computer.
3. Unlock any locking device that secures the computer cover.
4. Lay down the computer to place the computer cover facing up.
Removal steps
Note: If a locking device is available, use it to lock the computer.
Chapter 6
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Hardware removal and installation
51