Dell 7500 - Manual (Page 54)

3-10 Dell Inspiron 7500 System Reference and Troubleshooting Guide
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.
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.
Table 3-2. Default IRQ Line Assignments (continued)
IRQ Line Used/Available
NOTE: For the full name of an abbreviation or acronym used in this table, see the Glossary
in the system Help.