Dell OptiPlex 790 (Early 2011) - Manual (Page 5)

16 Power Supply..........................................................................................47
Removing The Power Supply ..........................................................................................47
Installing the Power Supply ............................................................................................49
17 System Board..........................................................................................51
Removing The System Board ..........................................................................................51
Installing the System Board ............................................................................................52
18 System Setup..........................................................................................53
System Setup ..................................................................................................................53
Boot Menu .......................................................................................................................53
Boot Menu Enhancements ..............................................................................................53
Timing Key Sequences ....................................................................................................54
Navigation .......................................................................................................................54
System Setup Options .....................................................................................................55
19 Troubleshooting......................................................................................65
Diagnostic LEDs ..............................................................................................................65
Beep Codes .....................................................................................................................72
Error Messages ...............................................................................................................75
20 Specifications.........................................................................................83
Technical Specifications .................................................................................................83
21 Contacting Dell.......................................................................................93
Contacting Dell ................................................................................................................93