1 Working on your computer............................................................................................................................. 6

Safety instructions............................................................................................................................................................. 6

Before working inside your computer..............................................................................................................................6

After working inside your computer.................................................................................................................................7

2 Chassis View..................................................................................................................................................8

Front chassis view..............................................................................................................................................................8

Back chassis view.............................................................................................................................................................. 9

Inside the system............................................................................................................................................................... 9

LCD panel.......................................................................................................................................................................... 10

Viewing Home screen................................................................................................................................................. 11

Setup menu................................................................................................................................................................. 12

View menu................................................................................................................................................................... 12

3 Product Overview.........................................................................................................................................13

System information label..................................................................................................................................................13

Precision 7920 Rack - Front system information label..........................................................................................13

Precision 7920 Rack - Service information............................................................................................................ 14

4 Removing and installing components............................................................................................................15

Product Positioning.......................................................................................................................................................... 15

Recommended tools.........................................................................................................................................................16

Need to know....................................................................................................................................................................16

Common error messages...........................................................................................................................................16

Startup-Shutdown sequence.................................................................................................................................... 18

Diagnostics and indicators............................................................................................................................................... 19

Chassis LEDs.....................................................................................................................................................................19

Status LED indicators.................................................................................................................................................19

Hard drive indicator codes........................................................................................................................................ 20

NIC indicator codes.................................................................................................................................................... 21

Power supply unit indicator codes............................................................................................................................21

iDRAC Direct LED indicator codes...........................................................................................................................22

iDRAC Quick Sync 2 indicator codes.......................................................................................................................23

Enhanced Preboot System Assessment................................................................................................................. 24

Jumpers and connectors ............................................................................................................................................... 26

System board jumpers and connectors................................................................................................................... 27

System board jumper settings..................................................................................................................................28

Disabling forgotten password................................................................................................................................... 29

Disassembly and reassembly.......................................................................................................................................... 30

Front Bezel..................................................................................................................................................................30

System cover.............................................................................................................................................................. 31

Optical drive................................................................................................................................................................32

Air shroud.................................................................................................................................................................... 33

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