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
98 Troubleshooting Your System
Checking Basic Power Problems
1
If the power indicator on the system front panel or power supplies does not indicate that power is
available to the system, ensure that the power cables are securely connected to the power supplies.
2
If the system is connected to a PDU or UPS, turn the PDU or UPS off and then on.
3
If the PDU or UPS is not receiving power, plug it into another electrical outlet. If it still is not receiving
power, try another PDU or UPS.
4
Reconnect the system to the electrical outlet and turn on the system.
If the system still is not working properly, see "Troubleshooting Power Supplies" on page 105.
Checking the Equipment
This section provides troubleshooting procedures for external devices attached to the system, such as the
monitor, keyboard, or mouse. Before you perform any of the procedures, see "Troubleshooting External
Connections" on page 99.
Troubleshooting IRQ Assignment Conflicts
Most PCI devices can share an IRQ with another device, but they cannot use an IRQ simultaneously. To
avoid this type of conflict, see the documentation for each PCI device for specific IRQ requirements.
Table 4-2 lists the IRQ assignments.
Table 4-2. IRQ Assignment Defaults
IRQ Line Assignment
IRQ0 System timer
IRQ1 Keyboard controller
IRQ2 Interrupt controller 1 to enable IRQ8 through IRQ15
IRQ3 Available
IRQ4 Serial port 1 (COM1 and COM3)
IRQ5 Remote access controller
IRQ6 Diskette drive controller
IRQ7 Parallel port
IRQ8 Real-time clock
IRQ9 ACPI functions (used for power management)
IRQ10 Available
IRQ11 Available
IRQ12 Available