Lenovo ThinkCentre M90z Hardware Maintenance Manual for ThinkCentre M90z - Page 99

Replacing the internal speakers,

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6. Connect the new ExpressCard to the ExpressCard connector on the system board. Align the screw holes in the new ExpressCard with the corresponding holes in the system board and then install the four screws to secure the new ExpressCard. 7. Go to "Completing the parts replacement" on page 110. Replacing the internal speakers Attention Do not open your computer or attempt any repair before reading and understanding the "Important safety information" in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre Safety and Warranty Guide, go to:http://www.lenovo.com/support This section provides instructions on how to replace the internal speakers. To replace the internal speakers, 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. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the cover is facing up. 3. Remove the computer cover. See "Removing the computer cover" on page 71. 4. Remove the rear I/O assembly cover. See "Removing or reinstalling the rear I/O assembly cover" on page 74. 5. Locate the internal speakers in the computer. See "FRU locations" on page 69. 6. Note the location of the internal speaker cable connection. Note the routing of the internal speaker cables. Disconnect the internal speaker cables from the system board. 7. Remove the two screws 1 that secure each internal speaker to the front bezel, and then remove the internal speakers from the computer. Chapter 8. Replacing FRUs 93

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6. Connect the new ExpressCard to the ExpressCard connector on the system board. Align the screw
holes in the new ExpressCard with the corresponding holes in the system board and then install the four
screws to secure the new ExpressCard.
7. Go to “Completing the parts replacement” on page 110.
Replacing the internal speakers
Attention
Do not open your computer or attempt any repair before reading and understanding the “Important safety
information” in the
ThinkCentre Safety and Warranty Guide
that came with your computer. To obtain a copy
of the
ThinkCentre Safety and Warranty Guide
This section provides instructions on how to replace the internal speakers.
To replace the internal speakers, 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. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 71.
4. Remove the rear I/O assembly cover. See “Removing or reinstalling the rear I/O assembly cover”
on page 74.
5. Locate the internal speakers in the computer. See “FRU locations” on page 69.
6. Note the location of the internal speaker cable connection. Note the routing of the internal speaker
cables. Disconnect the internal speaker cables from the system board.
7. Remove the two screws
1
that secure each internal speaker to the front bezel, and then remove the
internal speakers from the computer.
Chapter 8
.
Replacing FRUs
93