Chapter 11. Replacing Frus (Type 4155, 4158, 4218); Locating Controls And Connectors On The Front Of Your Computer; Rear Connectors - Lenovo ThinkStation Hardware Maintenance Manual

Chapter 11. Replacing FRUs (Type 4155, 4158, 4218)

Important
Before you replace any FRU, read Chapter 2 "Safety information" on page 3. These precautions and
guidelines will help you work safely.
FRU replacements are to be done by trained service technicians only.
This chapter does not contain a remove and replace procedure for all FRUs. Only the major FRUs are
documented.

Locating controls and connectors on the front of your computer

The following illustration shows the location of the controls and connectors on the front of your computer.
Note: Not all computer models will have the following controls and connections.
1
USB connector
2
Microphone connector
3
Headphone connector

Rear connectors

The following illustration shows the locations of the connectors on the rear of the computer.
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4
USB connector
5
IEEE 1394 connector
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