Lenovo ThinkStation S20 - Manual (Page 13)

Locating internal components
To remove the computer cover, see “Removing the computer cover” on page 11.
Figure 3 “Component locations” on page 7 shows the location of the components in your computer.
Figure 3. Component locations
1 Microprocessor, heat sink, and heat sink fan assembly 5 Hard disk drive
2 Optical drive 6 Rear fan assembly
3 3.5-inch diskette drive or card reader 7 Power supply assembly
4 Internal speaker
Chapter 2 . Overview 7