Dell 2010 service manual Clearing Forgotten Passwords and Cmos Settings

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NOTE: Write down your current boot sequence in case you want to restore it.

3Press the up- and down-arrow keys to move through the list of devices.

4Press plus (+) or minus (–) to change the boot priority of device.

Clearing Forgotten Passwords and CMOS Settings

1Follow the procedures in "Before You Begin" on page 11.

NOTE: The computer must be disconnected from the electrical outlet to clear the CMOS setting.

2Remove the computer cover (see "Removing the Computer Cover" on page 15).

3Reset the current password and CMOS settings:

a Locate the 3-pin CMOS reset jumper on the system board.

b Remove the jumper plug from the CMOS reset jumper pins 2 and 3.

c Place the jumper plug on the CMOS reset jumper pins 1 and 2 and wait approximately five seconds.

d Remove the jumper plug and replace it on the CMOS reset jumper pins 2 and 3.

System Setup

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Contents W . d e l l . c o m s u p p o r t . d e l l . c o m July Contents PCI and PCI Express Cards Processor Fan Heat Sink Assembly Changing Boot Sequence for Inside View of Your Computer Technical OverviewSystem Board Components Cpufan DIMM1 Technical Overview Technical Specifications Recommended Tools Before You BeginTurning Off Your Computer Safety Instructions Before You Begin Before You Begin Removing the Computer Cover Computer CoverReplacing the Computer Cover Place the computer in an upright position Computer Cover Removing the Front Bezel Front BezelReplacing the Front Bezel Removing Memory Modules Memory ModulesReplacing Memory Modules Cutouts Securing clip snapped in position Memory Modules Removing PCI and PCI Express Cards PCI and PCI Express CardsScrew Card Replacing PCI and PCI Express Cards PCI and PCI Express Cards PCI and PCI Express Cards Installed Removing a Hard Drive DrivesPower cable Data cable Screws Removing a Media Card Reader Replacing a Hard DriveFlexBay USB cable Screws Replacing a Media Card Reader Break-away metal plate Removing an Optical Drive Power cable Data cable Screws Replacing an Optical Drive Drives Drives Drives Removing the Power Switch Module Power Switch ModuleHard drive activity light Replacing the Power Switch Module Power Switch Module Removing the Front I/O Panel Front I/O PanelReplacing the Front I/O Panel Front I/O Panel Front I/O Panel Removing the Processor Fan and Heat Sink Assembly Processor Fan and Heat Sink AssemblyProcessor Fan and Heat Sink Assembly Replacing the Processor Fan and Heat Sink Assembly Processor Fan and Heat Sink Assembly Removing the Processor ProcessorProcessor Release lever Socket Replacing the Processor Processor Removing the System Board System BoardLift the system board up and out Replacing the System Board System Board Removing the Power Supply Power SupplyReplacing the Power Supply Power Supply Power Supply Removing the Battery BatteryReplacing the Battery System Setup Entering System SetupOverview System Setup System Setup Options USB Controller-Enabled or Disabled Enabled by Load Defaults Changing Boot Sequence for the Current Boot Clearing Forgotten Passwords and Cmos Settings Click Drivers & Downloads→Select Model Flashing the BiosSystem Setup System Setup