1.10.1 Rear panel connectors Asus prime Asus M3A78

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Chapter 1: Product introduction

1.10  Connectors

1.10.1  Rear panel connectors

1.  PS/2 keyboard port (purple). This port is for a PS/2 keyboard.
2.  LPT port. This 25-pin port connects a parallel printer, a scanner, or other 

devices.

3.  LAN (RJ-45) port. This port allows Gigabit connection to a Local Area 

Network (LAN) through a network hub.

LAN port LED indications

LAN port

SPEED 

LED

ACT/LINK 

LED

4.  Rear Speaker Out port (black). This port connects the rear speakers in a 

4-channel, 6-channel, or 8-channel audio configuration.

5.   Center/Subwoofer port (orange). This port connects the center/subwoofer 

speakers. 

6.  Line In port (light blue). This port connects the tape, CD, CD player, or 

other audio sources.

7.  Line Out port (lime). This port connects a headphone or a speaker. In 

4-channel, 6-channel, and 8-channel configuration, the function of this port 

becomes Front Speaker Out.

8.  Microphone port (pink). This port connects a microphone.
9.  Side Speaker Out port (gray). This port connects the side speakers in an 

8-channel audio configuration.

Activity/Link LED               Speed LED

Status

Description

Status

Description

OFF

No link

OFF

10 Mbps connection

ORANGE Linked

ORANGE 100 Mbps connection

BLINKING Data activity GREEN

1 Gbps connection

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