touch pad about, 1-3location, 1-1testing, 4-15troubleshooting, 3-22
troubleshooting about, 3-1
AC power failure, 3-13audible signs of problems, 3-3audio functions, 3-23
basic problems, 3-1battery power failure, 3-14beep codes, 3-7CD-ROM drive, 3-15checking connections, 3-2Diagnostics Checklist, 5-6
diskette drive failure during POST, 3-15 display failure, 3-18
dropped or damaged computer, 3-12external keyboard, 3-17
external monitor, 3-19
failure during RAM count, 3-18hard-disk drive failure during POST, 3-16I/O functions, 3-20
infrared port, 3-22IRQ conflicts, 3-10messages, 3-5monitor, 3-19 parallel port, 3-20parallel printer, 3-21partial power failure, 3-15serial devices, 3-21 serial port, 3-20 software errors, 3-9starting, 3-1
touch pad, 3-22 water damage, 3-11
TSR programs about, 3-9 problems with, 3-10
turning off the computer, 1-4
turning on the computer, 1-4
typographical conventions, x
U
Universal Serial Bus. See USB
upgrade options, 1-4
USB, 1-3
user’s documentation, x, 5-3
utilities reinstalling, 2-12
V
video control circuitry, 4-13
video controller, 4-13
video display, 1-2
video functions about, B-1testing, 4-13
video memory, A-3
video subsystem. See Video test group
Video test group
Dell Diagnostics, 4-13
video tests
Color Palettes Test, B-5
Graphics Mode Test, B-4Solid Colors Test, B-6
Text Mode Character Test, B-1 Text Mode Color Test, B-3 Text Mode Pages Test, B-4 Video Hardware Test, B-1 Video Memory Test, B-1
