User Guide
Table Of Contents
- Dell PowerEdge R720 and R720xd Owner's Manual
- About Your System
- Using The System Setup and Boot Manager
- Installing System Components
- Recommended Tools
- Front Bezel (Optional)
- Opening And Closing The System
- Inside The System
- Cooling Shroud
- System memory
- Hard Drives
- Removing A 2.5 Inch Hard-Drive Blank
- Installing A 2.5 Inch Hard-Drive Blank
- Removing A 2.5 Inch Hard-Drive Blank (Back)
- Installing A 2.5 Inch Hard-Drive Blank (Back)
- Removing A 3.5 Inch Hard-Drive Blank
- Installing A 3.5 Inch Hard-Drive Blank
- Removing A Hot-Swap Hard Drive
- Installing A Hot-Swap Hard Drive
- Removing A Hard Drive From A Hard-Drive Carrier
- Installing A Hard Drive Into A Hard-Drive Carrier
- Optical Drive (Optional)
- Cooling Fans
- Internal USB Memory Key (Optional)
- PCIe Card Holder
- Top Cover Lock Latch
- Cable Retention Bracket
- Expansion Cards And Expansion-Card Risers
- Expansion Card Installation Guidelines
- Removing An Expansion Card From The Expansion-Card Riser 2 Or 3
- Installing An Expansion Card Into The Expansion-Card Riser 2 Or 3
- Removing An Expansion Card From The Expansion-Card Riser 1
- Installing An Expansion Card Into The Expansion-Card Riser 1
- Removing Expansion-Card Risers
- Installing Expansion-Card Risers
- GPU Card Installation Guidelines
- Installing A GPU Card
- Removing A GPU Card
- SD vFlash Card
- Internal Dual SD Module
- Internal SD Card
- Integrated Storage Controller Card
- Network Daughter Card
- Processors
- Power Supplies
- System Battery
- Hard-Drive Backplane
- Control Panel Board
- System Board
- Troubleshooting Your System
- Safety First—For You And Your System
- Troubleshooting System Startup Failure
- Troubleshooting External Connections
- Troubleshooting The Video Subsystem
- Troubleshooting A USB Device
- Troubleshooting A Serial I/O Device
- Troubleshooting A NIC
- Troubleshooting A Wet System
- Troubleshooting A Damaged System
- Troubleshooting The System Battery
- Troubleshooting Power Supplies
- Troubleshooting Cooling Problems
- Troubleshooting Cooling Fans
- Troubleshooting System Memory
- Troubleshooting An Internal USB Key
- Troubleshooting An SD Card
- Troubleshooting An Optical Drive
- Troubleshooting A Tape Backup Unit
- Troubleshooting A Hard Drive
- Troubleshooting A Storage Controller
- Troubleshooting Expansion Cards
- Troubleshooting Processors
- Using System Diagnostics
- Jumpers And Connectors
- Technical Specifications
- System Messages
- Getting Help

Error Code Message Information
LCD Message Drive <
number
> removed from disk drive bay <
bay
>. Check drive.
Details The controller detected that the drive was removed.
Action Verify drive installation. Re-seat the failed drive. If the issue persists,
see
Getting Help.
PST0128
Message No memory is detected.
LCD Message No memory is detected. Inspect memory devices.
Details System BIOS was unable to detect memory in the system.
Action Re-seat the memory modules. If the issue persists, see Getting Help.
PST0129
Message Memory is detected, but is not configurable.
LCD Message Memory is detected, but is not configurable. Check memory devices.
Details System BIOS detected memory, but was unable to configure the
memory for system operation.
Action Compare system memory installation to supported system memory
configurations.
PSU0001
Message Power supply <
number
> failed.
LCD Message PSU <
number
> failed. Check PSU.
Action Remove and reinstall the power supply. If the issue persists, see
Getting Help.
PSU0002
Message A predictive failure detected on power supply <
number
>.
LCD Message Predictive failure on PSU <
number
>. Check PSU.
Details System performance and power redundancy may be degraded or
lost.
Action Remove and reinstall the power supply at the next service window. If
the issue persists, see
Getting Help.
PSU0003
Message The power input for power supply <
number
> is lost.
LCD Message Power input for PSU <
number
> is lost. Check PSU cables.
Details The power supply is installed correctly but an input source is not
connected or is not functional.
Action Verify the input source is attached to the power supply. Verify the
input power is within the operating requirements for the power
supply.
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