Dell OptiPlex GX400 User Manual Page 19
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Upgrading System Memory
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. Rotate the power supply away from the system board.
3. If necessary, remove any modules (RIMMs or CRIMMs) that occupy sockets in which you plan to install the upgrade modules.
4. Install the upgrade RIMMs.
5. Rotate the power supply back into position, making sure that the securing tab snaps into place.
6. Replace the computer cover, reconnect the computer and peripherals to their electrical outlets, and turn them on.
ALERT! Cover was previously removed.
The system detects that the new memory does not match the existing system configuration information and generates the following message:
The amount of system memory has changed.
Strike the F1 key to continue, F2 to run the setup utility
7. Enter system setup, and check the value for System Memory. The system should have already changed the value of System Memory to reflect the
newly installed memory. If the new total is correct, skip to step 9.
8. If the memory total is incorrect, repeat step 1 and step 2. Check the installed modules to ensure that they are seated properly in their sockets. Then
repeat step 5 through step 7.
9. When the System Memory total is correct, exit system setup.
10. Run the Dell Diagnostics to verify that the memory modules are operating properly.
Removing a Memory Module
1. Press the securing clips at each end of the socket outward simultaneously until the module pops out slightly from the socket (see the following figure).
Removing a Memory Module
2. Lift the module away from the socket.
CAUTION: Before you perform this procedure, see "Safety First— For You and Your Computer."
CAUTION: RIMMs can get very hot during system operation. Be sure that the RIMMs have had sufficient time to cool before you touch them.
NOTE: The system supports no more than a total of 64 memory devices on all installed RIMMs. See "RIMM Label Showing Number of Memory
Devices" for the location of the label on the RIMM that identifies the number of memory devices it contains. You can also determine the number of
memory devices installed through the System Memory option in system setup.
NOTE: If enabled, the Chassis Intrusion option will cause the following message to be displayed at the next system start-up:
NOTE: If you remove a module (RIMM or CRIMM), you must install another module in the empty socket before turning on the 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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