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Prepare the new card for installation.

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2 1 3 4 6 5 1 card retention latch 4 card-edge connector 2 alignment guide 5 card connector 3 card 6 release tab 2 Gently push the release tab on the card retention latch from the inside to pivot the latch open. The latch will remain in the open position. 3 If you are installing a new card, remove the filler bracket to create a card-slot opening. Then continue with step 5. 4 If you are replacing a card that is already installed in the computer, remove the card (see "Removing a PCI Express x1 Card" on page 49). If necessary, disconnect any cables connected to the card. Then continue with step 6. 5 Prepare the new card for installation. See the documentation that came with the card for information on configuring the card, making internal connections, or otherwise customizing it for your computer. CAUTION: Some network adapters automatically start the computer when they are connected to a network. To guard against electrical shock, be sure to unplug your computer from its electrical outlet before installing any cards. 6 Place the card in the connector and press down firmly. Ensure that the card is fully seated in the slot. Mini Tower Computer 47

Section	Page
Dell™ OptiPlex™ 740	1
User’s Guide	1
Contents	3
Finding Information	13
Before You Begin	19
Recommended Tools	19
Turning Off Your Computer	19
Before Working Inside Your Computer	20
Mini Tower Computer	21
About Your Mini Tower Computer	21
Front View	21
Back View	23
Back-Panel Connectors	25
Inside Your Computer	26
System Board Components	28
Mini Tower Computer (Model #DCSM) Specifications	31
I/O Panel	37
Removing the I/O Panel	37
Replacing the I/O Panel	38
Removing the Computer Cover	39
PCI, PCI Express Cards, and PS/2 Serial Port Adapters	41
PCI Cards	41
PCI Express Cards	46
PS/2 Serial Port Adapters	56
Drives	61
General Installation Guidelines	61
Hard Drive	63
Drive-Panel Inserts	70
Floppy Drive	73
Media Card Reader	76
Optical Drive	78
Processor	83
Removing the Processor	83
Installing the Processor	85
Power Supply	89
Replacing the Power Supply	89
DC Power Connectors	91
Desktop Computer	97
About Your Desktop Computer	97
Front View	97
Back View	98
Back-Panel Connectors	99
Inside Your Computer	101
System Board Components	102
Desktop Computer (Model # DCNE) Specifications	105
I/O Panel	111
Removing the I/O Panel	111
Replacing the I/O Panel	112
Drives	113
General Installation Guidelines	113
Optical Drive	115
Floppy Drive	118
Media Card Reader	121
Hard Drive	125
PCI, PCI Express Cards, and PS/2 Serial Port Adapters	135
PCI Cards	135
PCI Express and DVI Cards	146
PS/2 Serial Port Adapters	163
Power Supply	169
Replacing the Power Supply	169
DC Power Connectors	171
Removing the Computer Cover	177
Processor	179
Removing the Processor	179
Installing the Processor	182
Small Form Factor Computer	185
About Your Small Form Factor Computer	185
Front View	185
Back View	186
Back-Panel Connectors	187
Inside Your Computer	188
System Board Components	190
Small Form Factor Computer (Model # DCCY) Specifications	193
I/O Panel	199
Removing the I/O Panel	199
Replacing the I/O Panel	201
Removing the Computer Cover	203
Drives	205
General Installation Guidelines	205
Hard Drive	208
Optical Drive	215
Floppy Drive and Media Card Reader	217
PCI, PCI Express Cards, and PS/2 Serial Port Adapters	223
PCI Cards	223
PCI Express and DVI Cards	227
PS/2 Serial Port Adapters	233
Power Supply	237
Replacing the Power Supply	237
DC Power Connectors	239
Processor	243
Removing the Processor	243
Installing the Processor	245
Advanced Features	249
LegacySelect Technology Control	249
Manageability	249
Alert Standard Format	249
Dell OpenManage™ IT Assistant	250
Dell OpenManage Client Instrumentation	250
Security	250
Chassis Intrusion Detection	250
Option Settings	251
Padlock Ring and Security Cable Slot	251
Password Protection	252
System Password	252
Administrator Password	254
Disabling a Forgotten Password and Setting a New Password	255
Trusted Platform Module (TPM)	255
Enabling the TPM Feature	255
System Setup	257
Overview	257
Entering System Setup	257
System Setup Options	258
Booting to a USB Device	264
Memory Key	264
Floppy Drive	264
Jumper Settings	265
Mini Tower, Desktop, and Small Form Factor Computers	265
Clearing Forgotten Passwords	265
Clearing CMOS Settings	266
HyperTransport™ and Dual-Core Technology	267
Power Management	267
About RAID Configurations	268
Verifying That RAID Is Working	269
RAID Level 0 Configuration	269
RAID Level 1 Configuration	270
Configuring Your Hard Drives for RAID	270
Using the NVIDIA MediaShield ROM Utility	271
Using NVIDIA MediaShield	272
Enabling Cool ’n’ Quiet™ Technology	275
Chassis Intrusion Switch	277
Removing the Chassis Intrusion Switch	277
Mini Tower Computer	278
Desktop Computer	279
Small Form Factor Computer	280
Replacing the Chassis Intrusion Switch	280
Resetting the Chassis Intrusion Detector	280
Battery	283
Replacing the Battery	283
Replacing the System Board	287
Removing the System Board: Mini Tower, Desktop, and Small Form Factor Computers	287
Replacing the System Board: Mini Tower, Desktop, and Small Form Factor Computers	290
Memory	291
DDR2 Memory Overview	291
Addressing Memory With 4-GB or Greater Configurations (32-bit Operating Systems Only)	292
Removing Memory	293
Installing Memory	294
Replacing the Computer Cover	297
Cleaning Your Computer	299
Computer, Keyboard, and Monitor	299
Mouse	299
Cleaning a Non-Optical Mouse	299
Cleaning an Optical Mouse	300
Floppy Drive	300
CDs and DVDs	300
Reinstalling Drivers and the Operating System	301
Drivers	301
What Is a Driver?	301
Identifying Drivers	301
Reinstalling Drivers and Utilities	302
Restoring Your Operating System	305
Windows Vista	305
Windows XP	305
Creating a Restore Point	305
Restoring the Computer to an Earlier Operating State	306
Undoing the Last System Restore	306
Reinstalling Microsoft® Windows Vista® and Windows® XP	307
Before You Begin	307
Solving Problems	311
Troubleshooting Tips	311
Battery Problems	311
Card Problems	311
Drive Problems	313
CD and DVD drive problems	313
Hard drive problems	314
E-Mail, Modem, and Internet Problems	314
Keyboard Problems	315
Fan Problems	316
Lockups and Software Problems	316
The computer does not start up	316
The computer stops responding	316
A program stops responding	317
A program crashes repeatedly	317
A solid blue screen appears	317
Other software problems	317
Media Card Reader Problems	318
Memory Problems	318
Mouse Problems	319
Network Problems	320
Power Problems	321
Printer Problems	322
Restoring Default Settings	323
Serial or Parallel Device Problems	323
Sound and Speaker Problems	323
No sound from speakers	323
No sound from headphones	325
Video and Monitor Problems	325
If the screen is blank	325
If the screen is difficult to read	326
Troubleshooting Tools and Utilities	327
Dell Diagnostics	327
When to Use the Dell Diagnostics	327
System Lights	329
Diagnostic Lights	330
Beep Codes	332
Error Messages	333
Resolving Software and Hardware Incompatibilities	337
Microsoft® Windows® XP	337
Microsoft® Windows® XP and Windows Vista® Features	339
Transferring Information to a New Computer	339
Microsoft Windows Vista®	339
Microsoft® Windows® XP	339
User Accounts and Fast User Switching	342
Adding User Accounts	342
Fast User Switching	343
Setting Up a Home and Office Network	343
Connecting to a Network Adapter	343
Network Setup Wizard	344
Getting Help	347
Obtaining Assistance	347
Online Services	347
AutoTech Service	348
Automated Order-Status Service	348
Support Service	348
Problems With Your Order	349
Product Information	349
Returning Items for Warranty Repair or Credit	349
Before You Call	349
Contacting Dell	351
Warranty	353
FCC Regulatory Model (U.S. Only)	355

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Mini Tower Computer

Gently push the release tab on the card retention latch from the inside to pivot the latch open. The

latch will remain in the open position.

If you are installing a new card, remove the filler bracket to create a card-slot opening. Then continue

with step 5.

If you are replacing a card that is already installed in the computer, remove the card (see "Removing a

PCI Express x1 Card" on page 49).

If necessary, disconnect any cables connected to the card. Then continue with step 6.

Prepare the new card for installation.

See the documentation that came with the card for information on configuring the card, making

internal connections, or otherwise customizing it for your computer.

CAUTION:

Some network adapters automatically start the computer when they are connected to a network. To

guard against electrical shock, be sure to unplug your computer from its electrical outlet before installing any

cards.

Place the card in the connector and press down firmly. Ensure that the card is fully seated in the slot.

card retention latch

alignment guide

card

card-edge connector

card connector

release tab