Table 4-2. IRQ Assignment Defaults (continued)

IRQ Line

Assignment

 

 

IRQ9

ACPI functions (used for power management)

IRQ10

Available

IRQ11

Available

IRQ12

PS/2 mouse port unless the mouse is disabled through the System Setup

 

program

IRQ13

Math coprocessor

IRQ14

IDE CD drive controller

IRQ15

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 "Front-Panel Features and Indicators" on page 13 and "Back-Panel Features and Indicators" on page 17 for the front- and back-panel connectors on your system.

Troubleshooting the Video Subsystem

Problem

Monitor is not working properly.

Video memory is faulty.

Action

1Check the system and power connections to the monitor.

2Determine whether the system has an expansion card with a video output connector.

In this system configuration, the monitor cable should normally be connected to the connector on the expansion card, not to the system’s integrated video connector.

Troubleshooting Your System

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Dell DL2000 owner manual Troubleshooting External Connections, Troubleshooting the Video Subsystem, 131