Dell 100-Mbps manual Desktop Chassis, Thermal Monitoring

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NIC

GXpro systems contain either an integrated 10-Mbps or 10/100-Mbps 3Com NIC. GXpro systems containing the 10-Mbps Ethernet NIC have a built-in inte- grated 3Com 3C915 NIC chip. GXpro systems containing the 10/100-Mbps Ethernet NIC have a built-in integrated 3Com 3C916 Ethernet NIC chip. The NIC subsystem connects to the Ethernet network through a single RJ45 connec- tor on the back panel of the computer.

The 10/100-Mbps NIC supports a 10-Mbps direct connection to either a cate- gory-3 or a category-5 ethernet cable. When the NIC operates in the 100-Mbps mode, a category-5 ethernet cable must be used.

GXpro systems with the 10/100-Mbps NIC also contain two USB connectors. Thus, to determine whether a particular system contains the 10/100-Mbps NIC, look for one of the following indications:

USB connectors next to the NIC connector on the computer’s back panel

The message USB Enhanced displayed during the boot routine

A USB category on page 2 of the System Setup

If any of these indications are present, your system has the 10/100-Mbps NIC.

Chapter 5, “Using the Network Interface Controller,” in the User’s Guide pro- vides instructions for connecting the system to, and configuring it for use on, an Ethernet network.

USB

USB capability simplifies connection of peripheral devices such as mice, print- ers, and computer speakers. The USB connectors on your computer’s back panel provide a single connection point for multiple USB-compliant devices. USB-compliant devices can also be connected and disconnected while the sys- tem is running.

NOTE: USB capability is available only on systems with the 10/100-Mbps NIC.

Desktop Chassis

The system unit can be set horizontally or vertically, when used with the floor stand provided with the system. The floor stand attaches to the left side of the system.

Thermal Monitoring

The primary and, if installed, secondary microprocessors have a thermal sensor that monitors the processor’s temperature. If the critical threshold is exceeded, a system alarm triggers a system management interrupt (SMI), which alerts the BIOS. The power indicator flashes, and a message appears on the monitor to alert the user that the system will shut down in an orderly manner, preventing the loss of data.

System Overview

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Contents 659,&0$18$ Page Contents Chapter Basic Troubleshooting Chapter Beep Codes and Error MessagesChapter Removing and Replacing Parts Figures Index16. Expansion-Card Cage Removal TablesPage Read This First System Overview System Features System Unit Orientation Front-Panel Features Advanced Expansion Subsystem Dual-Processor CapabilityPCI Video Card Hard-Disk Drive OptionsEnhanced Dual-Interface Eide Subsystem Audio ControllerThermal Monitoring Desktop ChassisSmart Support System Power SupplyPin Assignments for the DC Power Connectors System UnitDC Power Connector P1 DC Power Connector P7 DC Power DistributionPower Distribution Video Memory System Board LayoutSystem Board Jumpers Main MemoryJumper Descriptions Interrupt AssignmentsIRQ14 DMA Channel AssignmentsTechnical Specifications Technical SpecificationsNIC CtrlAltEnter To 149 F Page Initial User Contact Basic TroubleshootingExternal Visual Inspection Observing the Boot Routine Internal Visual Inspection Eliminating Resource Conflicts Running the Diskette-Based DiagnosticsGetting Help Post Beep Codes Beep Codes and Error MessagesPost Beep Codes Halted System Error MessagesSystem Error Messages System could not suc System Setup program Incorrect configuration During memory test Faulty or improperly System does not recog Faulty diskette, diskette MS-DOS unable to Defective sectors on dis At system start-up One or both micro Recommended Tools Removing and Replacing PartsProtection of the Equipment Precautionary MeasuresPull the floor stand away from the system unit Floor StandSystem-Unit Cover Removal System Unit CoverEject, Power, and Reset Button Removal Eject, Power, and Reset ButtonsFront-Panel Insert Removal Front-Panel InsertsIndicator Card Removal Indicator CardSpeaker Removal SpeakerDrive Hardware Drives5-Inch Diskette Drive Removal Drives in the Drive Cage10 .25-Inch Drive Removal Lift the hard-disk drive bracket out of the system unit Hard-Disk Drives12. Hard-Disk Drive Removal 13. Power Supply Removal System Power Supply14. Microprocessor Fan Removal Microprocessor Fan15. System Board Components System Board ComponentsExpansion-Card Cage Expansion Cards17. Expansion-Card Removal Expansion Card18. Riser Board Removal Riser Board19. Dimm Removal DIMMs21. Microprocessor Securing Clip Microprocessor/Heat Sink Assembly22. Microprocessor Removal Terminator Card Terminator or Add-In Card24. Add-In Card Removal Add-In CardRemove the battery System BatteryRemove the system board as follows System BoardSystem Setup Program USB System Setup ScreensTable A-1. System Setup Categories Be shadowed or cached. If video problems Check the monitor documentation to make Table A-1. System Setup Categories Index Dskt connector, 1-12,4-16dual-processing,1-5 ECC DIMMs LINE-IN connector, 1-12,4-16 USB description Location, 1-4,1-12