Dell OptiPlex GX400 User Manual Page 51
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4. Remove the computer cover.
5. Remove and install the microprocessor.
6. Ensure that the microprocessor fan cable is firmly connected to the connector on the system board.
7. Replace the computer cover.
8. Stand the computer upright.
9. Reconnect the computer and peripherals to their electrical outlets, and turn them on.
Is the computer working properly?
Yes. The problem is resolved.
No. Contact Dell for technical assistance.
System Board Problems
A system board problem can result from a defective system board component, a faulty power supply, or a defective component connected to the system
board. If an error message indicates a system board problem, fill out the Diagnostics Checklist as you perform the following steps.
1. Reboot the system and run the System Board Devices test group in the Dell Diagnostics.
Did any of the tests fail?
Yes. Contact Dell for technical assistance.
No. Go to step 2.
2. Turn off the computer and peripherals, disconnect them from their electrical outlets, wait at least 5 seconds, and then remove the computer cover.
3. Make sure the power cables from the power supply are firmly connected to the connectors on the system board.
4. Replace the computer cover, reconnect the computer and peripherals to their electrical outlets, and turn them on.
Is the computer working properly?
Yes. The problem is resolved.
No. Go to step 5.
5. Perform the procedure in "Expansion-Card Problems."
Is the computer working properly?
Yes. The problem is resolved.
No. Go to step 6.
6. Perform the procedure in "Keyboard Problems."
Is the computer working properly?
Yes. The problem is resolved.
No. Go to step 7.
7. Perform the procedure in "Resetting a Damaged System Board."
Is the computer working properly?
Yes. The problem is resolved.
No. Contact Dell for technical assistance.
Resetting a Damaged System Board
If the system cannot boot and you have exhausted all other troubleshooting options, perform the following steps.
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. Install a jumper plug on the RTCRST jumper pins and then remove it.
See "Jumper Settings" to locate the real-time clock reset jumper (labeled "RTCRST") on the system board.
3. Replace the computer cover, reconnect the computer and peripherals to their electrical outlets, and turn them on.
Is the computer working properly?
CAUTION: Before you perform this procedure, see "Safety First— For You and Your Computer."
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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