Dell OptiPlex 990 - Working on Your Computer; Before Working Inside Your Computer

DELL™ OPTIPLEX™ 990 TECHNICAL GUIDEBOOK —VERSION 1.5
7
SMALL FORM FACTOR COMPUTER (SFF) VIEW
FRONT VIEW
1 Optical Drive 5
Microphone Connector
2 Optical Drive Eject Button 6
Headphone Connector
3
Power Button, Power
Light
7
Diagnostic Lights (4)
4 USB 2.0 Connectors (4) 8
Drive Activity Light
BACK VIEW
9 Padlock Ring 13 Power Supply Diagnostic
Light
10 Security Cable Slot 14 Back Panel Connectors
11 Power Connectors 15 Expansion Card Slots(2)
12 Power Supply Diagnostic
Button
1 Mouse Connector 7 Keyboard Connector
2 Serial Connector 8 DisplayPort Connector
3 Link Integrity Light 9 VGA Connector
4 Network Connector 10 USB Connectors (6)
BACK PANEL CONNECTORS
5 Network Activity Light 11 Line-in/Microphone
Connector
6 Line-out Connector