Lenovo 4221 Laptop User Manual


 
Figure 40. Installing a new internal speaker
7. Connect the internal speaker cable to the system board. See “Locating parts on the system board”
on page 71.
8. To complete the installation or replacement, go to “Completing the FRU replacement” on page 103.
Completing the FRU replacement
This section provides instructions on how to complete the FRU replacement.
After replacing the FRUs, you need to reinstall any removed parts, reconnect and route any internal cables,
reinstall the computer cover, and reconnect any external cables, such as power cords. Depending on the
FRUs replaced, you might need to conrm the updated information in the Setup Utility program, see Chapter
6 “Using the Setup Utility program” on page 39
.
Note: When the power cord is rst plugged in, the computer might appear to turn on for a few seconds and
then turn off. This is a normal sequence to enable the computer to initialize.
To reinstall the computer cover and reconnect cables to your computer:
1. Ensure that all components have been reassembled correctly and that no tools or loose screws are
left inside your computer. See “Locating components” on page 70 for the location of the various
components.
2. If you have removed the front bezel, reinstall it. See “Removing and reinstalling the front bezel” on
page 74.
3. Make sure that the cables are routed correctly before reinstalling the computer cover. Keep cables clear
of the hinges and sides of the computer chassis to avoid interference with reinstalling the computer
cover.
Chapter 9. Replacing FRUs 103