Personal Computer User Manual
Table Of Contents
- Hardware Owner’s Manual
- Contents
- About Your System
- Using the System Setup Program
- Installing System Components
- Recommended Tools
- Inside the System
- Removing and Replacing the Optional Front Bezel
- Opening and Closing the System
- Cooling Fans
- Cooling Shrouds
- Power Supplies
- Expansion Cards
- RAC Card
- System Memory
- Processors
- Processor VRMs
- Installing a Diskette Drive
- Installing an Optical Drive
- Hard Drives
- SAS Controller Cards
- Connecting an External SAS Tape Drive
- Connecting an External Fibre Channel Storage Device
- System Battery
- Control Panel Assembly (Service-Only Procedure)
- Fan Interposer Board (Service-Only Procedure)
- Power Distribution Board (Service-Only Procedure)
- Chassis Intrusion Switch (Service-Only Procedure)
- SAS Backplane (Service-Only Procedure)
- System Board (Service-Only Procedure)
- Troubleshooting Your System
- Safety First-For You and Your System
- Start-Up Routine
- Checking Basic Power Problems
- Checking the Equipment
- Troubleshooting Serial I/O Problems
- Troubleshooting a NIC
- Troubleshooting a Wet System
- Troubleshooting a Damaged System
- Troubleshooting the System Battery
- Troubleshooting Power Supplies
- Troubleshooting System Cooling Problems
- Troubleshooting System Memory
- Troubleshooting a Diskette Drive
- Troubleshooting an Optical Drive
- Troubleshooting a Hard Drive
- Troubleshooting a SAS Controller or SAS RAID Controller
- Troubleshooting an External SAS Tape Drive
- Troubleshooting Expansion Cards
- Troubleshooting the Microprocessors
- Running the System Diagnostics
- Jumpers and Connectors
- Getting Help
- Glossary
- Index

About Your System 15
Power Indicator Codes
The power button on the front panel controls the power input to the system's power supplies. The power
indicator can provide information on power status (see
Figure 1-1
). Table 1-4 lists the power button
indicator codes.
The indicators on the power supplies show whether power is present or whether a power fault has
occurred (see Figure 1-4).
Figure 1-4. Power Supply Indicators
Table 1-4. Power Button Indicators
Indicator Function
On Indicates that power is supplied to the system and the system is operational.
Off Indicates that no power is supplied to the system.
Table 1-5. Power Supply Indicators
Indicator Function
Power supply status Green indicates that the power supply is operational.
Power supply fault Amber indicates a problem with the power supply.
AC line status Green indicates that a valid AC source is connected to the power supply.
1 power supply status indicator 2 power supply fault indicator 3 AC line status indicator
3
2
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