Table 4-1. Start-Up Routine Indications
Look/listen for: | Action |
|
|
An unfamiliar constant scraping or | See "Getting Help" on page 165. |
grinding sound when you access a drive. |
|
The keyboard indicators. | See "Troubleshooting the Keyboard" on |
| page 130. |
The USB diskette drive activity indicator.
The USB CD drive activity indicator.
See "Troubleshooting a USB Device" on page 132.
See "Troubleshooting a USB Device" on page 132.
The CD drive activity indicator.
See "Troubleshooting an Optical Drive" on page 141.
The hard drive activity indicator.
See "Troubleshooting a Hard Drive" on page 142.
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 129.
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
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 | Serial port 2 (COM2 and COM4) |
IRQ4 | Serial port 1 (COM1 and COM3) |
128
Troubleshooting Your System
