Gateway 6400 To remove the power supply:

Replacing the power supply

To remove the power supply:

1Turn off the system and disconnect the power cord, modem cord (if installed), and all external peripheral devices.

2Remove the left side cover panel. (See “Removing the side cover” on page 18 and “Preventing static electricity discharge” on page 15.)

3Lay the case on its right side, if possible.

4Disconnect the power supply connectors from all internal devices including the 3.5-inch diskette drive, the CD drive, and all hard drives.

5Disconnect the main power supply connector to the system board by pressing on the tab to release the connector, then gently pulling the connector from the board.

6Remove the cable supports securing the power supply cables to the chassis.

Replacing the power supply

Contents

Page Preface System Features System Setup Case Access 4 Replacing and Adding System Components Using the BIOS Setup Utility Managing Your System Cleaning Your System Troubleshooting Safety and Regulatory Information Reference Data Index Page Preface Page Page Page System1 Features CD activity LED CD drive CD eject button Diskette drive Diskette eject button Front panel LEDs Power On LED HDD Activity LED NIC Activity LED System Fault LED Chassis lock Kensington lock slot Keyboard port Mouse port Parallel (printer) port Thumbscrews USB ports Video port Voltage selector Page Page Page System Setup To start the system: Page Understanding the Power-On Self-Test Setting up the operating system To complete the operating system setup for Windows NT: To turn off your system in Windows NT: To close unresponsive programs and reset your system in Windows NT: Case Access To prevent static electricity discharge: Page Page Removing the side cover To remove the left side cover panel: Removing the bezel To remove the bezel: Replacing the bezel To replace the bezel: Replacing the side cover To replace the chassis cover: Page Replacing and Adding System Components Preparing to replace or add a drive Page Drive cabling information 3.5-inchdiskette or CD drives Replacing the 3.5-inchdiskette or CD drive To replace the drives: Page Adding a 3.5-inchdevice To install an additional device in the 3.5-inchdrive bay: Page Page Adding a 5.25-inchdevice To install an additional device in the 5.25-inchdrive bay: Page Page Hard drive Replacing the hard drive To replace the hard drive: Adding a hard drive To install an additional hard drive: Page To replace DIMMs: To add or remove DIMMs: Page To remove the heatsink: Page To remove the processor: To install the new processor: To replace the heatsink: To add an additional processor: To add an expansion card: Page To replace the battery: Troubleshooting the battery installation Page To remove the system board: Page To install the system board: Page Page To remove the power supply: To install the new power supply: Page To remove the front system fan: Page Page To install the new front system fan: To remove the rear system fan assembly: To install the new rear system fan assembly: To remove the control/LED board: To install the new control/LED board: Page Using the BIOS Setup Utility Page Page The Clear Password switch The Clear CMOS switch Page Page Managing Your System Surge suppressors Line conditioners Uninterruptible power supplies Hard drive maintenance utility Using Check Disk in Windows NT To use Check Disk: Hard drive management practices Checking hard drive space To check hard drive space: Backing up files To run Backup in Windows NT: To delete .tmp files: Deleting temporary Internet files Emptying the Recycle Bin To decrease the size of the Recycle Bin: Protecting your computer from viruses To remove a virus: ManageX Event Manager Gateway™ server management software System security Mechanical locks and monitoring Software locks through the BIOS Setup utility Using passwords Changing passwords Unattended start mode Summary of software security features Page Creating a startup diskette To create a startup diskette: Using your Server Companion CD Page Cleaning Your Page Troubleshooting Verifying your configuration Troubleshooting guidelines An audio CD produces no sound The system does not recognize the CD drive The system does not recognize the diskette drive The diskette drive will not read, write, or format The diskette drive LED illuminates continuously The system does not recognize the SCSI drive The system does not recognize the IDE drive The system detected memory errors during start up The system does not recognize a new or second processor The system does not recognize the modem The system does not recognize a SCSI device The system does not recognize an adapter card The printer will not turn on The printer is turned on but will not print The printer prints garbled text The system will not start up The system is non-responsive The keyboard does not work The mouse does not work The system is running but the screen is blank The image on the screen is dim or difficult to read The color monitor displays everything in black and white The displayed characters are garbled The video is distorted Page Error message Solutions Page Page Page Safety and RegulatoryA Information Setting up your system Care during use Replacement parts and accessories Page Page Page American users Declaration of Conformity Responsible Party FCC Part 68 (applicable to products fitted with USA modems) Canadian users European users Japanese users Australia and New Zealand users External television antenna grounding Lightning protection Power lines Reference Grounding component All rights reserved Trademark acknowledgments Page Reference Data System specifications Environmental specifications Resource Address Page Page Address Range (hex) Amount Function Interrupt I/O APIC Level Page DMA Resource Numerics