Headphone connector and microphone connector on the front panel

Audio line-in connector, audio line-out connector, and microphone connector on the rear panel

Internal speaker (available in some models)

Connectivity

10/100/1000 Mbps integrated Ethernet controller

System management features

Ability to store the power-on self-test (POST) hardware test results

Advanced Configuration and Power Interface (ACPI)

Automatic power-on startup

Desktop Management Interface (DMI)

Intel Trusted Execution Technology (Intel TXT)

Preboot Execution Environment (PXE)

System Management (SM) Basic Input/Output System (BIOS) and SM software

Wake on LAN (WOL)

Windows Management Instrumentation (WMI) (WMI is the infrastructure for management data and operations on Windows operating systems.)

Input/Output (I/O) features

9-pin serial port (one standard and one optional)

One DVI monitor connector

One Ethernet connector

One parallel port (available in some models)

One Personal System/2 (PS/2) keyboard connector

One PS/2 mouse connector

One VGA monitor connector

Six Universal Serial Bus (USB) 2.0 connectors (two on the front panel and four on the rear panel)

Three audio connectors on the rear panel

(audio line-in connector, audio line-out connector, and microphone connector)

Two audio connectors on the front panel (headphone connector and microphone connector)

For more information, refer to “Locating connectors, controls, and indicators on the front of your computer” on page 6 and “Locating connectors and parts on the rear of your computer” on page 7.

Expansion

One hard disk drive bay

One optical drive bay

One slim card reader drive bay

One PCI Express x16 graphics card slot

One PCI Express x1 card slot

Two PCI card slots

2ThinkCentre User Guide

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Lenovo 7539, 7548, 104, 154 manual Connectivity

7539, 154, 7548, 104 specifications

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