Dell 7500 manual Troubleshooting Procedures, Troubleshooting a Wet Computer

Table 3-2. Default IRQ Line Assignments (continued)

IRQ Line	Used/Available
IRQ6	Generated by the diskette drive controller to indicate that the
	diskette drive requires the attention of the microprocessor
IRQ7	Used by the parallel port
IRQ8	Generated by the system RTC
IRQ9	Reserved for internal system control interrupts
IRQ10	Free
IRQ11	Generated by the CardBus controller and the video controller
IRQ12	Generated by the keyboard controller to indicate that the output
	buffer of the integrated touch pad or external PS/2 mouse is full
IRQ13	Used by the math coprocessor on the microprocessor
IRQ14	Primary IDE controller
IRQ15	Generated by the secondary IDE controller (CD-ROM drive)
	to indicated that the drive requires attention of the
	microprocessor.

NOTE: For the full name of an abbreviation or acronym used in this table, see the Glossary

in the system Help.

Troubleshooting Procedures

This section provides troubleshooting procedures for integrated components (such as the display) and for external devices that connect to the computer (such as an external monitor). Before performing any of the procedures in this section, see “Basic Checks” found earlier in this chapter and read the safety instructions at the front of this guide. Then perform the appropriate troubleshooting procedure for the component or equipment that is malfunctioning.

NOTES: When you see the question “Is the problem resolved?” in a troubleshooting procedure, perform the operation that caused the problem to see if the problem still occurs.

Before you begin any of the troubleshooting procedures, make sure the Quiet Boot option is set to Disabled in the Main menu of the Setup program. See Appendix B, “Using the Setup Program,” for information on using the Setup program.

Troubleshooting a Wet Computer

Liquids, spills and splashes, rain, and excessive humidity can cause moisture damage to the computer. If the computer gets wet or if condensation forms on the computer because of humid conditions, perform the following steps.

3-10 Dell Inspiron 7500 System Reference and Troubleshooting Guide