Dell PowerEdge SC 430 - Manual (Page 21)

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
Troubleshooting External Connections
Loose or improperly connected cables are the most likely source of problems for the system, monitor, and other peripherals (such as a printer, keyboard,
mouse, or other external device). Ensure that all external cables are securely attached to the external connectors on your system. See
Figure 2 -1 for the front-
panel connectors on your system and Figure 2 -2 for back-panel connectors.
Troubleshooting the Video Subsystem
Problem
l Monitor is not working properly.
Action
1. Check the system and power connections to the monitor.
2. Run the appropriate online diagnostic test. See " Using Server Administrator Diagnostics " in "Running the System Diagnostics."
If the tests run successfully, the problem is not related to video hardware.
If the tests fail, see " Getting Help ."
Troubleshooting the Keyboard
Problem
l System message indicates a problem with the keyboard.
l Keyboard is not functioning properly.
Action
1. Run the appropriate online diagnostic test. See " Using Server Administrator Diagnostics " in "Running the System Diagnostics."
2. Examine the keyboard and its cable for signs of damage.
IRQ Line Assignment
IRQ0 System timer
IRQ1 Keyboard controller
IRQ2 Interrupt controller 1 to enable IRQ8 through IRQ15
IRQ3 Serial port 2 (COM2 and COM4)
IRQ4 Serial port 1 (COM1 and COM3)
IRQ5 Remote access controller
IRQ6 Diskette drive (optional) controller
IRQ8 Real-time clock
IRQ9 ACPI functions (used for power management)
IRQ10 Available
IRQ11 Available
IRQ13 Math coprocessor
IRQ14 IDE CD drive controller
IRQ15 Available