Dell PowerEdge SC440 Hardware Owner's Manual  - Page 80

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 IRQ0 IRQ1 IRQ2 IRQ3 IRQ4 IRQ5 IRQ6 IRQ8 IRQ9 IRQ10 IRQ11 IRQ13 IRQ14 IRQ15 Assignment System timer Keyboard controller Interrupt controller 1 to enable IRQ8 through IRQ15 Serial port 2 (COM2 and COM4) Serial port 1 (COM1 and COM3) Remote access controller Diskette drive (optional) controller Real-time clock ACPI functions (used for power management) Available Available Math coprocessor IDE CD drive controller Available 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 1-2 for the back-panel connectors on your system. 80 Troubleshooting Your System