Lenovo ThinkCentre M91p Hardware Maintenance Manual - Page 75

Replacing FRUs, Locations, Locating connectors, controls, and indicators on the front of yo

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Chapter 8. Replacing FRUs This chapter provides step-by-step instructions for replacing major FRUs. Important Be sure to read and understand the Chapter 2 "Safety information" on page 3 before replacing any FRU. These precautions and guidelines will help you work safely. FRU replacements are to be done only by trained service technicians. Locations This section provides information to help you locate the connectors on the front and rear of your computer, parts on the system board, and components and internal drives in your computer. Locating connectors, controls, and indicators on the front of your computer Figure 1 "Front connector, control, and indicator locations" on page 69 shows the locations of the connectors, controls, and indicators on the front of your computer. Figure 1. Front connector, control, and indicator locations 1 Hard disk drive activity indicator 2 Power indicator 3 Power switch 4 Optical drive eject/close button 5 USB connector (USB port 1) 6 Microphone connector 7 Headphone connector 8 USB connector (USB port 2) © Copyright Lenovo 2011, 2012 69

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Chapter 8.
Replacing FRUs
This chapter provides step-by-step instructions for replacing major FRUs.
Important
Be sure to read and understand the Chapter 2 “Safety information” on page 3 before replacing any FRU.
These precautions and guidelines will help you work safely.
FRU replacements are to be done only by trained service technicians.
Locations
This section provides information to help you locate the connectors on the front and rear of your computer,
parts on the system board, and components and internal drives in your computer.
Locating connectors, controls, and indicators on the front of your
computer
Figure 1 “Front connector, control, and indicator locations” on page 69 shows the locations of the
connectors, controls, and indicators on the front of your computer.
Figure 1. Front connector, control, and indicator locations
1
Hard disk drive activity indicator
5
USB connector (USB port 1)
2
Power indicator
6
Microphone connector
3
Power switch
7
Headphone connector
4
Optical drive eject/close button
8
USB connector (USB port 2)
© Copyright Lenovo 2011, 2012
69