Troubleshooting Your System 131
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 page13 and "Back-Panel Features and Indicators"
on page17 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
1
Check the system and power connections to the monitor.
2
Determine 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.
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
Table 4-2. IRQ Assignment Defaults (continued)
IRQ Line Assignment
Book.book Page 131 Monday, September 14, 2009 12:57 PM