Dell OptiPlex 990 Desktop Service Manual
Also see for D05D: Setup and features information
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Contents
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16 Power Supply..........................................................................................49Removing The Power Supply..........................................................................................49Installing The Power Supply...........................................................................................5117 System Board..........................................................................................53Removing The System Board..........................................................................................53Installing The System Board...........................................................................................5418 Power Supply Unit (PSU) Thermal Sensor.........................................57Removing The PSU Thermal Sensor...............................................................................57Installing The PSU Thermal Sensor................................................................................5819 System Setup..........................................................................................59System Setup..................................................................................................................59Boot Menu.......................................................................................................................59Boot Menu Enhancements..............................................................................................59Timing Key Sequences....................................................................................................60Beep Codes and Text Error Messages............................................................................61Navigation.......................................................................................................................61System Setup Options.....................................................................................................6120 Troubleshooting......................................................................................73Diagnostic LEDs..............................................................................................................73Diagnostic Light Patterns..........................................................................................73Beep Codes.....................................................................................................................80Error Messages...............................................................................................................83Address mark not found............................................................................................83Alert! Previous attempts at booting this system have failed at checkpoint[nnnn]. For help in resolving this problem, please note this checkpoint andcontact Dell Technical Support................................................................................83Alert! Security override Jumper is installed.............................................................84Attachment failed to respond...................................................................................84Bad command or file name ......................................................................................84Bad error-correction code (ECC) on disk read.........................................................84 |
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