Dell PowerEdge 840 Hardware Owner's Manual (PDF) - Page 92

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." 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 IRQ7 IRQ8 IRQ9 IRQ10 IRQ11 IRQ12 IRQ13 IRQ14 IRQ15 Assignment System timer Keyboard controller Interrupt controller 1 to enable IRQ8 through IRQ15 Available Serial port 1 (COM1 and COM3) Remote access controller Diskette drive controller Available Real-time clock ACPI functions (used for power management) Available Available PS/2 mouse port unless the mouse is disabled through the System Setup program Math coprocessor IDE optical drive controller Available Troubleshooting the Video Subsystem Problem • Monitor is not working properly. • Video memory is faulty. 92 Troubleshooting Your System