
Table
Look/listen for: | Action |
|
|
The CD drive activity indicator. | See "Troubleshooting an Optical Drive" on |
| page 143. |
The
An unfamiliar constant scraping or grinding sound when you access a drive.
See "Troubleshooting a Hard Drive" on page 146.
See "Getting Help" on page 167.
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 131.
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
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 controller |
IRQ7 | Reserved |
IRQ8 |
130
Troubleshooting Your System