Dell NM176 owner manual Troubleshooting External Connections, Troubleshooting the Video Subsystem

Table 4-2. IRQ Assignment Defaults (continued)

IRQ Line	Assignment
IRQ6	Available
IRQ7	Available
IRQ8	Real-time clock
IRQ9	ACPI functions (used for power management)
IRQ10	Available
IRQ11	Available
IRQ12	PS/2 mouse port (available if the mouse is disabled through the System
	Setup program)
IRQ13	Math coprocessor
IRQ14	Available
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 Figure 1-1 for the front-panel connectors and Figure 1-2 for the back-panel connectors on your system.

Troubleshooting the Video Subsystem

Problem

•Monitor is not working properly.

•Video memory is faulty.

Troubleshooting Your System

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