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FCC Notices (U.S. Only

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FCC Notices (U.S. Only) FCC Class B This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the manufacturer's instruction manual, may cause interference with radio and television reception. This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: 1 This device may not cause harmful interference. 2 This device must accept any interference received, including interference that may cause undesired operation. NOTICE: The FCC regulations provide that changes or modifications not expressly approved by Dell Inc. could void your authority to operate this equipment. These limits are designed to provide reasonable protection against harmful interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference with radio or television reception, which can be determined by turning the equipment off and on, you are encouraged to try to correct the interference by one or more of the following measures: • Reorient the receiving antenna. • Relocate the system with respect to the receiver. • Move the system away from the receiver. • Plug the system into a different outlet so that the system and the receiver are on different branch circuits. If necessary, consult a representative of Dell Inc. or an experienced radio/television technician for additional suggestions. The following information is provided on the device or devices covered in this document in compliance with the FCC regulations: • Product name: Dell™ OptiPlex™ 755 • Model numbers: DCTR, DCNE, DCSM, DCCY • Company name: Dell Inc. Worldwide Regulatory Compliance & Environmental Affairs One Dell Way Round Rock, TX 78682 USA 512-338-4400 NOTE: For Further regulatory information, see your Product Information Guide. FCC Notices (US Only) 373

Section	Page
Dell™ OptiPlex™ 755	1
User’s Guide	1
Contents	3
Finding Information	17
Before You Begin	21
Recommended Tools	21
Turning Off Your Computer	21
Before Working Inside Your Computer	21
Mini Tower Computer	23
About Your Mini Tower Computer	23
Front View	23
Back View	25
Back Panel Connectors	26
Removing the Computer Cover	27
Inside Your Computer	29
Chassis Intrusion Switch	29
Removing the Chassis Intrusion Switch	30
Replacing the Chassis Intrusion Switch	30
Resetting the Chassis Intrusion Detector	31
System Board Components	32
Mini Tower Computer Specifications	35
Cards	41
Installing a PCI or PCI Express Card	41
Removing a PCI or PCI Express Card	45
PS/2 Serial Port Adapter	47
Installing eSATA	51
Drives	53
General Drive Installation Guidelines	53
Hard Drive	55
Floppy Drive	63
Media Card Reader	66
Optical Drive	69
Processor	73
Removing the Processor	73
Installing the Processor	74
I/O Panel	77
Removing the I/O Panel	77
Replacing the I/O Panel	78
Power Supply	79
Replacing the Power Supply	79
DC Power Connectors	81
Speakers	85
Installing a Speaker	85
Removing a Speaker	86
Desktop Computer	87
About Your Desktop Computer	87
Front View	87
Back View	88
Back Panel Connectors	89
Removing the Computer Cover	90
Inside Your Computer	91
Chassis Intrusion Switch	92
Removing the Chassis Intrusion Switch	92
Replacing the Chassis Intrusion Switch	93
Resetting the Chassis Intrusion Detector	93
Removing the Heat Sink Assembly	94
System Board Components	95
Desktop Computer Specifications	97
Cards	103
PCI Cards	103
PS/2 Serial Port Adapter	116
eSATA	123
Drives	127
General Drive Installation Guidelines	127
Drive Inserts	129
Optical Drive	131
Floppy Drive	134
Media Card Reader	137
Hard Drive	142
Processor	149
Removing the Processor	149
Installing the Processor	150
I/O Panel	153
Removing the I/O Panel	153
Replacing the I/O Panel	154
Power Supply	155
Replacing the Power Supply	155
DC Power Connectors	157
Speakers	163
Installing a Speaker	163
Removing a Speaker	164
Small Form Factor Computer	165
About Your Small Form Factor Computer	165
Front View	165
Back View	166
Back Panel Connectors	167
Removing the Computer Cover	168
Inside Your Computer	169
Chassis Intrusion Switch	170
Removing the Chassis Intrusion Switch	170
Replacing the Chassis Intrusion Switch	171
Resetting the Chassis Intrusion Detector	171
System Board Components	172
Small Form Factor Computer Specifications	175
Cards	181
PCI Cards	181
PCI Express and DVI Cards	185
PS/2 Serial Port Adapter	191
eSATA	193
Drives	195
General Installation Guidelines	195
Hard Drive	197
Replacing a Hard Drive Fan	202
Optical Drive	204
Floppy Drive	206
Media Card Reader	209
Processor	213
Removing the Processor	213
Installing the Processor	214
I/O Panel	217
Removing the I/O Panel	217
Replacing the I/O Panel	218
Power Supply	219
Replacing the Power Supply	219
DC Power Connectors	221
Speakers	225
Installing a Speaker	225
Removing a Speaker	225
Ultra Small Form Factor Computer	227
About Your Ultra Small Form Factor Computer	227
Front View	227
Side View	228
Back View	229
Back Panel Connectors	229
Removing the Computer Cover	232
Inside Your Computer	233
Chassis Intrusion Switch	233
Removing the Chassis Intrusion Switch	234
Replacing the Chassis Intrusion Switch	234
Resetting the Chassis Intrusion Detector	235
System Board Components	236
Cable Cover (Optional)	237
Connecting the AC Power Adapter	238
Dell Badge	239
Ultra Small Form Factor Computer Specifications	241
Drives	247
General Installation Guidelines	247
Hard Drive	248
Module Bay	255
Installing a Device When Your Computer Is Turned Off	255
Removing and Installing a Device When Your Computer Is Running Microsoft® Windows®	258
Securing a Device in the Module Bay	259
Processor	261
Speakers	267
Installing a Speaker	267
Removing a Speaker	268
Advanced Features	269
LegacySelect Technology Control	269
Manageability	269
DASH	269
Active Management Technology	270
Alert Standard Format	272
Dell OpenManage™ Applications	272
Dell Client Manager (DCM)	273
Physical Security	274
Chassis Intrusion Detection	274
Option Settings	274
Padlock Ring and Security Cable Slot	274
Trusted Platform Module (TPM)	275
Enabling the TPM Feature	275
Security Management Software	276
Computer Tracking Software	276
About Smart Cards and Fingerprint Readers	276
Password Protection	277
System Password	277
Administrator Password	279
Disabling a Forgotten Password and Setting a New Password	280
System Setup	280
Overview	280
Entering System Setup	280
System Setup Screens	281
System Setup Options	281
Boot Sequence	287
Booting to a USB Device	288
Memory Key	288
Floppy Drive	289
Jumper Settings	289
Clearing Forgotten Passwords	290
Clearing CMOS Settings	291
Hyperthreading and Multi-Core Technology	292
Power Management for Windows XP and Windows Vista	292
Options in Windows XP	292
Options in Windows Vista	294
About RAID Configurations	295
Verifying That RAID Is Working	296
RAID Level 0	296
RAID Level 1 Configuration	297
Configuring Your Computer for RAID	297
Recovering From a Single Hard Drive Failure (RAID 1) Using the Intel Matrix Storage Manager	300
Migrating to a RAID Level 0 Configuration	301
Migrating to a RAID Level 1 Configuration	301
Battery	303
Replacing the Battery	303
Replacing the System Board	307
Removing the System Board: Mini Tower, Desktop, Small Form Factor, and Ultra Small Form Factor Computers	307
Mini Tower System Board Screws	308
Desktop System Board Screws	309
Small Form Factor System Board Screws	310
Ultra Small Form Factor System Board Screws	311
Replacing the System Board: Mini Tower, Desktop, Small Form Factor, and Ultra Small Form Factor Computers	311
Memory	313
DDR2 Memory Overview	313
Addressing Memory Configurations	314
Installing Memory	314
Removing Memory	316
Replacing the Computer Cover	317
Mini-Tower, Desktop, and Small Form Factor Computers	317
Ultra Small Form Factor Computers	317
Installing Your Computer in an Enclosure	319
Cleaning Your Computer	323
Computer, Keyboard, and Monitor	323
Mouse	323
Cleaning a Non-Optical Mouse	323
Cleaning an Optical Mouse	323
Floppy Drive	324
CDs and DVDs	324
Microsoft® Windows® Features	325
Transferring Information to a New Computer	325
Microsoft® Windows® XP	325
Microsoft Windows Vista®	327
Setting Up a Home and Office Network	328
Connecting to a Network Adapter	328
Network Setup	328
Troubleshooting	331
Battery Problems	331
Card Problems	331
Drive Problems	332
E-Mail, Modem, and Internet Problems	334
Error Messages	335
Keyboard Problems	336
Lockups and Software Problems	336
Memory Problems	338
Mouse Problems	338
Network Problems	339
Power Problems	339
Printer Problems	341
Scanner Problems	342
Sound and Speaker Problems	342
Video and Monitor Problems	343
Power Lights	344
System Lights	345
Diagnostic Lights	347
Beep Codes	350
System Messages	351
Dell Diagnostics	353
When to Use the Dell Diagnostics	353
Drivers	356
What Is a Driver?	356
Identifying Drivers	356
Reinstalling Drivers and Utilities	357
Troubleshooting Software and Hardware Problems in the Microsoft® Windows® XP and Microsoft Windows Vista® Operating Systems	358
Restoring Your Operating System	359
Using Microsoft Windows System Restore	359
Using Dell™ PC Restore and Dell Factory Image Restore	361
Using the Operating System Media	363
Getting Help	365
Obtaining Assistance	365
Online Services	365
AutoTech Service	366
Automated Order-Status Service	366
Support Service	366
Problems With Your Order	367
Product Information	367
Returning Items for Warranty Repair or Credit	367
Before You Call	367
Contacting Dell	370
Warranty	371
FCC Notices (U.S. Only)	373

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FCC Notices (US Only)

373

FCC Notices (U.S. Only)

FCC Class B

This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in

accordance with the manufacturer’s instruction manual, may cause interference with radio and television

reception. This equipment has been tested and found to comply with the limits for a Class B digital

device pursuant to Part 15 of the FCC Rules.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two

conditions:

This device may not cause harmful interference.

This device must accept any interference received, including interference that may cause undesired

operation.

NOTICE:

The FCC regulations provide that changes or modifications not expressly approved by Dell Inc. could void

your authority to operate this equipment.

These limits are designed to provide reasonable protection against harmful interference in a residential

installation. However, there is no guarantee that interference will not occur in a particular installation. If

this equipment does cause harmful interference with radio or television reception, which can be

determined by turning the equipment off and on, you are encouraged to try to correct the interference by

one or more of the following measures:

•

Reorient the receiving antenna.

•

Relocate the system with respect to the receiver.

•

Move the system away from the receiver.

•

Plug the system into a different outlet so that the system and the receiver are on different branch

circuits.

If necessary, consult a representative of Dell Inc. or an experienced radio/television technician for

additional suggestions.

The following information is provided on the device or devices covered in this document in compliance

with the FCC regulations:

•

Product name: Dell™ OptiPlex™ 755

•

Model numbers: DCTR, DCNE, DCSM, DCCY

•

Company name:

Dell Inc.

Worldwide Regulatory Compliance & Environmental Affairs

One Dell Way

Round Rock, TX 78682 USA

512-338-4400

NOTE:

For Further regulatory information, see your

Product Information Guide