Power Indicator Codes, Green Link indicator is

Indicator	Indicator Code
Link and activity	The NIC is not connected to the network.
indicators are off
Link indicator is	The NIC is connected to a valid network at its maximum port speed (1 Gbps or 10 Gbps).
green
Link indicator is	The NIC is connected to a valid network at less than its maximum port speed.
amber
Activity indicator is	Network data is being sent or received.
blinking green

Power Indicator Codes

Each AC power supply has an illuminated translucent handle and each DC power supply (when available) has an LED that serves as an indicator to show whether power is present or whether a power fault has occurred.

Figure 6. AC Power Supply Status Indicator

1.AC power supply status indicator/handle

Figure 7. DC Power Supply Status Indicator

1.DC power supply status indicator

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Dell R820 owner manual Power Indicator Codes, Green Link indicator is, AC power supply status indicator/handle

Contents

Regulatory Model E21S Series Regulatory Type E21S001 Dell Inc. All Rights Reserved Contents Installing System Components General Memory Module Installation GuidelinesInstalling Memory Modules Internal USB Memory Key Optional Installing The Integrated Storage Controller CardInstalling The Power Supply Blank Installing The Hard-Drive Backplane Troubleshooting Your System Using System DiagnosticsJumpers And Connectors Technical Specifications System MessagesGetting Help Page Indicator, Button, or Icon Description Connector Front-Panel Features And Indicators LCD Panel Features Setup Menu Home ScreenView Menu Hard-Drive Indicator Patterns PCIe expansion card slots Back-Panel Features And IndicatorsSteady green Drive online Blinks green three Seconds System identification button NIC Indicator CodesPower supply PSU2 Or 1100 W When available Link indicator Activity indicator DC power supply status indicator Power Indicator CodesGreen Link indicator is AC power supply status indicator/handle Other Information You May Need F11 F12 Choosing The System Boot ModeKeystroke Description F10 Entering System Setup Responding To Error MessagesUsing The System Setup Navigation Keys System Information Screen System Setup OptionsSystem Setup Main Screen System Bios Screen Processor Settings Screen Memory Settings Screen Execute Disable option is set to Enabled Option is set to EnabledPrefetcher option is set to Enabled Execute Disable Sata Settings Screen Boot Settings ScreenIntegrated Devices Screen Serial Communications Screen System Profile Settings Screen System Security Screen Miscellaneous Settings System And Setup Password Features Assigning a System And/Or Setup Password Operating With a Setup Password Enabled Using Your System Password To Secure Your System Exits the Boot Manager and proceeds with system boot Entering The Uefi Boot ManagerUsing The Boot Manager Navigation Keys Boot Manager Screen IDRAC Settings Utility Entering The iDRAC Settings UtilityEmbedded System Management IDRAC Settings screen is displayed Changing The Thermal SettingsPage Recommended Tools Front Bezel OptionalRemoving The Front Bezel Release latch Keylock Front bezel Locking hook Installing The Front BezelOpening And Closing The System Opening The System Inside The System Closing The SystemSystem cover Latch Latch release lock DIMMs Cooling-fan assemblyHeat sink for processor QPI connectors Cable securing bracket Processor Expansion Module Removing the Processor Expansion ModuleHeat sink for processor DIMMs Processor expansion module Removing and Installing the Processor Expansion Module Installing The Processor Expansion Module Filler bracket Standoffs TabsNotches Cooling Shroud Removing The Cooling ShroudCooling shroud Touch points System Memory Installing The Cooling Shroud Memory Socket Locations on the System Board Processor Memory channels are organized as follows General Memory Module Installation Guidelines Mode-Specific Guidelines1066 Advanced ECC Lockstep Sample Memory Configurations 2R x8, 1600 MT/s 2R x8, 1333 MT/s 1R x8, 1333 MT/s 1R x8, 1600 MT/s A1, A2, B1, B21R x8, 1600 MT/s 1R x8, 1333 MT/s 2R x8, 1333 MT/s 384 2R x4, 1333 MT/s 192 2R x4, 1333 MT/s2R x4, 1600 MT/s B3, B4, B5, B6 256 2R x4, 1333 MT/s 2R x4, 1600 MT/s 1024 4R x4, 1066 MT/s Removing Memory Modules256 2R x4, 1333 MT/s 768 4R x4, 1333 MT/sPage Hard Drives Installing Memory Modules Hard-drive blank Release button Installing a 2.5 Inch Hard-Drive BlankRemoving a 2.5 Inch Hard-Drive Blank Removing a Hot-Swap Hard Drive Release button Hard drive Hard-drive carrier handle Installing a Hot-Swap Hard Drive Hard-drive carrier Hard drive Screws Removing a Hard Drive From a Hard-Drive Carrier Installing a Hard Drive Into a Hard-Drive Carrier Optical Drive OptionalRemoving The Optical Drive Your system supports hot-swappable cooling fans Installing The Optical DriveOptical drive Power and data cable Release tab Cooling Fans Removing a Cooling Fan Removing and Installing a Cooling Fan Removing The Cooling-Fan Assembly Installing The Cooling Fan Replacing The Internal USB Key Installing The Cooling-Fan AssemblyCooling-fan assembly Guide pins Cooling fans Internal USB Memory Key Optional Riser PCIe Slot Expansion Cards Installation GuidelinesUSB memory key connector Expansion Cards And Expansion-Card Risers Full Height Pcie Extender Adapter SSD Removing An Expansion Card From An Expansion-Card Riser 1 Or Expansion-card holder Expansion-card riser Expansion card Expansion-card connectorPage Removing An Expansion Card From The Expansion-Card Riser Page Grooves Expansion-card holder Tab Expansion card Installing An Expansion Card Into The Expansion-Card Riser Removing Expansion-Card Risers Removing and Installing the Expansion Card Riser Touch points Connector Expansion-card riser Expansion-card connector slotRiser guide-back right Riser guide-back left Connector Riser guide-front Installing Expansion-Card Risers SD vFlash CardRiser guide-front top Internal Dual SD Module Replacing An SD vFlash CardRemoving The Internal Dual SD Module Installing the Internal Dual SD Module Blue pull tabSD card Retention tab Dual SD module Removing An Internal SD Card Installing An Internal SD CardInternal SD Card Integrated Storage Controller Card Removing The Integrated Storage Controller Card Removing the SAS Cable Connector Storage-controller card SAS connectors Storage-controller card Cables Expansion-card latchRiser card Installing The Integrated Storage Controller Card Network Daughter CardCable securing bracket Cable securing guide SAS cables Screws PCH shroud Removing The Network Daughter Card Captive screws Touch point Installing The Network Daughter CardUse the following procedure when Processors Removing The Processor Removing and Installing the Processor Heat Sink Processor Shield Opening and Closing Lever Sequence Close-lock symbol Processor shield Installing The Processor Hot Spare Feature Power Supplies Connector Power supply Release latch Power supply handle Removing An AC Power Supply Installing An AC Power Supply Wiring Instructions For a DC Power SupplySupply voltage -48-60 V DC Current consumption 32 a maximum Grounding post #6-32 nut Locking washer Safety ground wire DC power connector DC power socket Wire -48 Rubber cap Wire RTN Captive screws Power supply status indicator Removing a DC Power SupplyInstalling a DC Power Supply Connector Release latch Power supply Removing The Power Supply Blank Installing The Power Supply BlankPower supply blank Replacing The System Battery System Battery Removing The Hard-Drive Backplane Hard-Drive Backplane Hooks Release tab Securing slots SAS a connector Power connector SAS B connector Signal connector Signal connector SAS B connector Cabling Diagram-Dual 2.5 Inch x8 Hard-Drive Backplane Hard-drive backplane SAS a connector PCIe SSD backplane Connector Diagram-2.5 Inch x4 PCIe SSD Backplane PCIe SSD a connector Signal connector PCIe SSD D connectorPerc card SAS B connector System board Signal connector Hooks Securing slots Connectors Release tabs Cable retention bracket Power connector Installing The Hard-Drive Backplane Control Panel Assembly Removing The Control-Panel AssemblyControl-panel connector cable Captive screws Information tag Tabs Installing The Control-Panel AssemblySystem Board Removing The System BoardPage System board System-board holder Thumb screw Installing The System BoardPage Troubleshooting External Connections Troubleshooting The Video SubsystemTroubleshooting a USB Device Troubleshooting a NIC Troubleshooting a Serial I/O Device Troubleshooting a Damaged System Troubleshooting a Wet System 106 Troubleshooting The System BatteryTroubleshooting Power Supplies Troubleshooting Cooling Problems Troubleshooting System Memory Troubleshooting Cooling Fans Troubleshooting An SD Card Troubleshooting An Internal USB Key Troubleshooting a Tape Backup Unit Troubleshooting An Optical Drive Troubleshooting a Storage Controller Troubleshooting a Hard Drive Troubleshooting Expansion Cards Troubleshooting Processors Dell Online Diagnostics Dell Embedded System Diagnostics When To Use The Embedded System DiagnosticsRunning The Embedded System Diagnostics System Diagnostic Controls Least one event description is recorded114 Jumper Setting Description System Board Jumper Settings Connector Description System Board Connectors Front Panel USB connector Riser 1 connectorBattery connector Optical drive Sata connector Disabling a Forgotten Password Expansion slots using riser card Expansion BusMemory Internal Connectors BackDrives Front Expanded Operating Temperature Environmental TemperatureVideo Maximum Shock EnvironmentalRelative Humidity Maximum Vibration Gaseous Contamination 124 Removing LCD Messages System Error MessagesLCD Messages Viewing LCD Messages Action Error CodeAMP0302 Message Details CPU0000 Message ASR0003 MessageBAT0002 Message BAT0017 Message CPU0700 Message CPU0010 MessageCPU0023 Message CPU0204 Message CPU0702 Message CPU0703 MessageCPU0704 Message Details Fan operating speed is out of range Action If the issue persists, see Getting HelpAction Reinstall or reconnect the hardware HWC2003 Message FAN0000 Message MEM0701 Message MEM0000 MessageMEM0001 Message MEM0007 Message PCI1304 Message MEM1208 MessageMEM8000 Message PCI1302 Message PCI1360 Message PCI1320 MessagePCI1342 Message PCI1348 Message PSU0002 Message PST0128 MessagePST0129 Message PSU0001 Message PSU0032 Message PSU0006 MessagePSU0016 Message PSU0031 Message PSU0037 Message PSU0034 MessagePSU0035 Message PSU0036 Message System power consumption PSU1201 Message Power supply redundancy is lost DetailsSystem power inventory change Configuration and power consumption RFM2002 Message RFM1014 MessageRFM1201 Message RFM2001 Message Security may be compromised SEL0006 Message All event logging is disabled DetailsAppear if the user disabled event logging Power. If problem persists call support TMP0121 Message Issues persists, contact supportFailed Failures Alert Messages Diagnostic MessagesReview system logs for power supply exceptions Reinstall system cables 142 Contacting Dell Getting Help

Dell R820 Power Indicator Codes, Green Link indicator is, AC power supply status indicator/handle

Models: R820

green

Link indicator is

Power Indicator Codes

Figure 6. AC Power Supply Status Indicator

1.AC power supply status indicator/handle

Figure 7. DC Power Supply Status Indicator

1.DC power supply status indicator