Dell OptiPlex K7821 Quick Reference Manual page 36

P
power light, 22
problems
beep codes, 26
conflicts, 27
Dell Diagnostics, 19
diagnostic lights, 22
restore computer to previous
operating state, 28
R
reinstalling
drivers, 5
Windows XP , 30
ResourceCD
Dell Diagnostics, 19
S
Service Tag, 5
software
conflicts, 27
system lights, 22
System Restore, 28
T
troubleshooting
conflicts, 27
Dell Diagnostics, 19
diagnostic lights, 22
36
Index
Hardware Troubleshooter, 27
Help and Support Center, 6
restore computer to previous
operating state, 28
U
User's Guide, 5
W
Windows 2000
Device Manager, 28
Hardware Troubleshooter, 28
Windows XP
Hardware Troubleshooter, 27
Help and Support Center, 6
reinstalling, 30
System Restore, 28