Dell PowerEdge R200 Hardware Owner's Manual (PDF) - Page 98

Table 4-1. Start-Up Routine Indications (continued) Look/listen for: Action The USB diskette drive activity indicator. See "Troubleshooting a USB Device" on page 102. The USB CD drive activity indicator. See "Troubleshooting a USB Device" on page 102. The optical drive activity indicator. See "Troubleshooting an Optical Drive" on page 110. The hard-drive activity indicator. See "Troubleshooting a Hard Drive" on page 111. An unfamiliar constant scraping or grinding sound when you access a drive. See "Getting Help" on page 127. 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 IRQ0 IRQ1 IRQ2 IRQ3 IRQ4 IRQ5 Assignment System timer Keyboard controller Interrupt controller 1 to enable IRQ8 through IRQ15 Available Serial port 1 (COM1 and COM3) Available 98 Troubleshooting Your System