Dell OptiPlex GX400 User Manual Page 26
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SCSI logic requires that termination be enabled for the two devices at opposite ends of the SCSI chain and disabled for all devices in between.
Dell recommends that you use terminated cables and that you disable termination on all devices. See the documentation provided with any optional SCSI
device you purchase for information on disabling termination on the device.
General Guidelines
Follow these general guidelines when installing SCSI devices in your computer:
l Although you install SCSI devices essentially the same way as other devices, their configuration requirements are different. For details on configuring
your particular SCSI subsystem, refer to the documentation for your SCSI devices and/or your host adapter card.
l Configure the device for a SCSI ID number and disable termination, if necessary.
l If you are installing an external SCSI device, connect one end of the external SCSI cable to the bus connector on the back of the device. Attach the
other end of the external SCSI cable to the connector on the controller installed in the computer.
l After installing a SCSI hard drive, Primary Drive 0 and Primary Drive 1 should be set to None in system setup. If you have any EIDE devices on the
second EIDE channel, such as a CD or tape drive, Secondary Drive 0 and/or Secondary Drive 1 should be set to Auto. If you have any SCSI devices on
the second EIDE channel, Secondary Drive 0 and/or Secondary Drive 1 should be set to None.
l You may need to use programs other than those provided with the operating system to partition and format SCSI hard drives. Refer to the
documentation that came with your SCSI software drivers for information on installing the appropriate drivers and preparing your SCSI hard drive for
use.
SCSI Cables
Ultra2/Wide low-voltage differential (LVD) drives (typically hard drives) use a 68-pin cable. One end of this cable attaches to the SCSI controller card. The
remaining connectors on the cable attach to the various LVD drives.
Narrow SCSI drives (tape drives, CD drives, and some hard drives) use a 50-pin cable. One end of this cable attaches to the SCSI controller card. The
remaining connectors on the cable attach to the various Narrow SCSI devices.
AGP Card Brace
To access some components on the system board in the chassis, you may need to remove the accelerated graphics port (AGP) card brace.
1. Turn off the computer and peripherals, disconnect them from their electrical outlets, wait at least 5 seconds, and then remove the computer cover.
2. Lay the computer on its right side.
3. Remove the screw that secures the AGP card brace to the chassis (see the following figure).
Removing the AGP Card Brace
4. Rotate the brace up until it disengages from the card guide at the front of the chassis. Then lift the brace away from the chassis.
To replace the AGP card brace, perform the following steps:
1. Insert the tab on one end of the brace into the slot on the card guide at the front of the chassis (see the preceding figure).
2. Lower the brace, ensuring that the AGP retention lever on the bottom of the brace is aligned with the top of the AGP card.
3. Replace the screw that secures the brace to the chassis.
Expansion Cards
NOTICE: Dell recommends that you use only SCSI cables purchased from Dell. Cables purchased elsewhere are not guaranteed to work with Dell
systems.
CAUTION: Before you perform this procedure, see "Safety First— For You and Your Computer."
- Notes, Notices, and Cautions 1
- About Your Computer 2
- Back View of Your Computer 3
- Inside Your Computer 4
- System Board Components 5
- Advanced Features 6
- Manageability 7
- Security 8
- Password Protection 9
- Setup Password 10
- Jumper Settings 11
- Installing a TAPI Device 12
- Power Management 13
- Installing Upgrades 15
- Power Supply 17
- Front Panel 17
- System Memory 18
- Upgrading System Memory 19
- Removing a Memory Module 19
- Disk Drives and Media 20
- General Guidelines 25
- EIDE Cables 25
- SCSI ID Numbers 25
- Device Termination 25
- AGP Card Brace 26
- Expansion Cards 26
- Removing the Filler Bracket 27
- Microprocessor 29
- Removing the Microprocessor 31
- Removing the VRM 32
- Replacing the VRM 32
- System Battery 33
- Back to Contents Page 34
- Technical Specifications 35
- Solving Problems 38
- Monitor Problems 39
- Video Problems 39
- Sound and Speaker Problems 40
- Printer Problems 41
- Mouse Problems 43
- Keyboard Problems 43
- Diskette Drive Problems 44
- Hard Drive Problems 45
- Battery Problems 47
- Expansion-Card Problems 47
- Repairing a Wet Computer 48
- Hardware Conflicts 49
- System Memory Problems 50
- Microprocessor Problems 50
- System Board Problems 51
- Dell Diagnostics 52
- Advanced Testing 53
- Messages and Codes 54
- System Beep Codes 56
- Warning Messages 57
- Diagnostics Messages 57
- Diagnostic Indicators 57
- Back-Panel Indicators 58
- Software Problems 59
- BIOS Recovery Utility 61
- Getting Help 62
- Problems With Your Order 63
- Product Information 63
- Before You Call 63
- Dell Contact Numbers 64
- Additional Information 71
- IC Notice (Canada Only) 72
- CE Notice (European Union) 72
- Battery Disposal 72
- VCCI Notice (Japan Only) 73
- MIC Class A Regulatory Mark 74
- Class B Device 74
- MIC Class B Regulatory Mark 74
- BSMI Notice (Taiwan Only) 75
- ENERGY STAR®Compliance 76
- Coverage During Year One 77
- General Provisions 77
- Safety Instructions 80
- Overview 82
- New User Interface 82
- Clean Desktop Wizard 83
- Taskbar Grouping 83
- Notification Area Cleanup 83
- System Restore 84
- Restore Process 85
- Driver Rollback 85
- How to Add Users 86
- Internet Connection Firewall 87
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